OPINION ON REHEARING
EVELYN V. KEYES, Justice.Appellant, firefighter Elmer F. Williams II, appeals a take-nothing judgment rendered after the trial court denied Williams’s motions for partial summary judgment and granted (1) the summary judgment motions of the Houston Firemen’s Relief and Retirement Fund (the Fund) and the individual appellees, who were the Fund’s board members (collectively, “the trustees”), and (2) the summary judgment motions and dismissal motion of appellee the City of Houston (“the City”). We issued our original opinion in this appeal on December 27, 2001. Appellant moved for rehearing, as did the Fund and the trustees. We grant Williams’s motion for rehearing. We deny the Fund’s and trustees’ motion as moot. The Court’s prior opinion and judgment of December 27, 2001 are vacated, set aside, and annulled, and this opinion and judgment are issued in their stead. We modify the judgment and affirm as so modified.
FACTUAL AND PROCEDURAL BACKGROUND
Williams joined the Houston Fire Department (“HFD”) and the Fund in 1990, after six years and five months of service with two other cities’ fire departments, neither of which had statutory firefighters’ retirement funds like Houston’s. In 1995, Williams sought to purchase prior service credit (“PSC”) under the firemen’s retirement-fund statute (“the retirement statute”) for these six years and five months of service, to be applied toward his retirement with HFD. The PSC provision of the former retirement statute, section 30, provided:
A firefighter who transfers from the fire department of one city to that of a city covered by this Act and desires to participate in the fund of that city shall: ... [meet three requirements, including paying “into the fund of that city an amount equal to the total contribution he would have made had he been employed by that city instead of the city from which he transferred.”].2
The statute was silent as to whether the city from which the firefighter transferred had to have a fund. While Williams’s request was pending, the Fund adopted guidelines construing section 30: years worked outside Houston could be credited towards retirement only if the former city had a similar statutory firefighter’s fund. (The parties refer to this interpretation by the Fund and the trustees as “the guidelines,” and so do we.) Applying the guidelines, the Fund denied Williams’s PSC request in January 1997. The reason for that denial was that the cities in which Williams had worked before did not have firefighters’ retirement funds similar to Houston’s.
Subsequently, the Legislature repealed article 6243e.2 and replaced it with article 6243e.2(l). Article 6243e.2(l), the current retirement statute, restated and amended former article 6243e.2, the former retirement statute, and continued in effect each firefighter’s relief and retirement fund es*423tablished under that article.3 The PSC provision of the current retirement statute, section 16(a), provides:
“A person who becomes a firefighter in a municipality to which this article applies may receive service credit for 'prior employment with the fully paid fire department of another municipality in this state with a similar fund benefitting only firefighters of that municipality to which the firefighter contributed if ... [the firefighter meets five requirements].”4
The Fund and the trustees interpreted the first sentence of former section 30(a) to mean what the italicized portion of current section 16(a) now expressly says.
Williams I
That same year, Williams sued the Fund in district court, alleging statutory and constitutional claims and challenges to the Fund’s guidelines and its PSC determination. On the Fund’s motion,5 the trial court dismissed all of Williams’s claims against the Fund, without prejudice, for lack of subject matter jurisdiction — except (1) his constitutional claims and (2) his challenge that the Fund’s ruling was barred by res judicata, claim preclusion, issue preclusion, waiver, estoppel, and collateral estoppel. Williams appealed the dismissal order. On interlocutory appeal, we affirmed, holding that the trial court had neither “appellate”6 nor original jurisdiction to consider the dismissed claims until 2003, the earliest possible date Williams might be “eligible for retirement.” Williams v. Houston Firemen’s Relief & Ret. Fund, No. 01-98-00681-CV, slip op. at 5-14, 1999 WL 82441 (Tex.App.-Houston [1st Dist.] Feb. 11, 1999, no pet.) (op. on reh’g) (not designated for publication) (hereinafter “Williams I ”).
Williams II
Williams subsequently added the City and the four trustees, in their individual and official capacities, as defendants. He also added common law claims against all defendants. The Fund filed supplemental motions for traditional rule 166a(c) summary judgment; the trustees moved for 166a(c) summary judgment and incorporated the summary judgment grounds alleged by the Fund; the City moved to dismiss for lack of subject matter jurisdiction or, alternatively, for rule 166a(c) summary judgment; and Williams moved for rule 166a(c) partial summary judgment.7
*424By the time all summary judgment and dismissal motions were considered, Williams was asserting the following claims and challenges:
Challenges to the Merits of the Guidelines and The Fund’s and the Trustees’ PSC Determination
1. The Fund and the trustees misconstrued section 30 of the former retirement statute;
2. No or insufficient evidence supported the Fund and the trustees’ PSC determination;
3. The Fund and the trustees’ PSC determination was not supported by substantial evidence; and
4. The Fund’s PSC determination was barred by res judicata, claim preclusion, issue preclusion, waiver, estop-pel, and collateral estoppel.
Constitutional Claims
1. The Fund’s guidelines and the trustees’ application of them exceeded their statutory authority;
2. The former retirement statute unconstitutionally delegated governmental authority to the Fund;
3. The Fund’s guidelines and the trustees’ PSC determination were an unlawful and unconstitutional retroactive application of the law that adversely affected Williams’s vested property right to PSC;
4. The Fund’s guidelines and the trustees’ application of them were an unconstitutional local or special law;
5. As applied, the guidelines denied Williams equal protection under the state constitution; and
6. The Fund’s and the trustees’ PSC determination violated substantive due process.
Common Law Claims 8
1. The trustees and the City fraudulently concealed from Williams or misled him about his right to purchase PSC, which acts were also breaches of their fiduciary and good-faith-and-fair-dealing duties;
2. All defendants conspired to construe the PSC statute against Williams, to withhold material information from and mislead him (presumably about the right to purchase PSC), to breach their fiduciary and good-faith-and-fair-dealing duties to him, to conceal those breaches from him, and “to refuse to act in his best interests”; and
3. The above acts of “conspiracy” also constituted fraudulent misrepresentation, fraudulent concealment, and breaches of the defendants’ fiduciary and good-faith-and-fair-dealing duties.
Williams sought compensatory and punitive damages, declaratory relief, pre- and post-judgment interest, attorney’s fees, and costs.
The trial court granted the Fund’s and the trustees’ summary judgment motions; granted the City’s motion to dismiss or, alternatively, for summary judgment; de*425nied Williams’s motions for partial summary judgment; and rendered a take-nothing judgment against Williams. Williams appealed, asserting that the district court had subject matter jurisdiction over all his statutory, constitutional and common law claims under the retirement statute, the Texas Trust Code,9 and its inherent constitutional powers; that the trustees and the City were not immune from his common law claims; that the Fund and the trustees were barred from changing them interpretation of the guidelines by res judicata, stare decisis, and collateral estoppel; and that he was entitled to judgment on the merits of his statutory, constitutional, and common law claims.
In our previous opinion in this appeal, we declined to revisit our holding in Williams I that the former retirement statute did not provide for review of the issues raised by Williams’s suit. Williams v. Houston Firemen’s Relief and Ret. Fund, No. 01-99-01361-CV, 2001 WL 1671349 (Tex.App.-Houston [1st Dist.] Dec. 27, 2001, no writ) (not designated for publication) (hereinafter “Williams II”). We again held that the retirement statute’s express language permits judicial review of a member’s challenges to the Fund’s action only when the member is eligible for retirement or disabled. See id., slip op. at 5-8. Since Williams was not then eligible for retirement, we held that his statutory claims were not ripe, despite his having exhausted his administrative remedies. Since ripeness is a prerequisite for justici-ability, we further held that none of Williams’s other claims — which derived from his statutory claims — were ripe. We therefore granted the Fund’s jurisdictional plea, reformed the trial court’s judgment to correspond to our ruling, and, as modified, affirmed. See Williams II, slip op. at 5-8,12-14. Williams’s and the Fund’s and trustees’ motions for rehearing followed.
Rehearing
On rehearing, we withdraw our opinion of December 27, 2001 and issue this opinion in its stead. We hold that Williams has no statutory right to judicial review of his claims. However, Texas law recognizes a right to judicial review of administrative orders that violate a constitutional right. We hold that Williams has standing to raise his constitutional claims, but those claims are without merit. We further hold that the City is immune to Williams’s Trust Code and common law claims under the doctrine of sovereign or governmental immunity and that the trustees are immune under the doctrine of official immunity. We reform the judgment to reflect dismissal of all claims over which the district court lacked jurisdiction and, as modified, affirm.
STANDARDS OF REVIEW
We follow the usual standard of review for a summary judgment order that specifies no grounds, denies one party’s rule 166a(c) motion, and grants the other parties’ rule 166a(c) motions. See Tex.R. Civ. P. 166a(c); Bradley v. State ex rel. White, 990 S.W.2d 245, 247 (Tex.1999); Science Spectrum, Inc. v. Martinez, 941 S.W.2d 910, 911 (Tex.1997). Summary judgment under rule 166a(c) is proper only when a movant establishes that there is no genuine issue of material fact and that he is entitled to judgment as a matter of law. Tex.R. Civ. P. 166a(c); Randall’s Food Mkts., Inc. v. Johnson, 891 S.W.2d 640, 644 (Tex.1995). A defendant is entitled to summary judgment if the evidence disproves as a matter of law at least one element of each of the plaintiffs causes of action or if the evidence conclusively estab*426lishes all elements of an affirmative defense. Id.
When all parties move for summary judgment and the trial court grants some motions and denies others, we can consider all motions, their evidence, and their issues and may render the judgment that the trial court should have rendered. See CU Lloyd’s v. Feldman, 977 S.W.2d 568, 569 (Tex.1998). When an order granting summary judgment does not specify the grounds upon which the trial court ruled, we must affirm to the extent that any of the summary judgment grounds is meritorious. See Star-Telegram, Inc. v. Doe, 915 S.W.2d 471, 473 (Tex.1995).
To the extent the trial court dismissed Williams’s claims for want of jurisdiction, we construe Williams’s pleadings in his favor and look to his intent. Tex. Ass’n of Bus. v. Tex. Air Control Bd., 852 S.W.2d 440, 446 (Tex.1993). We review the trial court’s grant of a plea to the jurisdiction de novo. Lukes v. Employees Ret. Sys. of Texas, 59 S.W.3d 838, 841 (Tex.App.-Austin 2001, no pet.).
SUMMARY JUDGMENT FOR THE FUND AND THE TRUSTEES
We first address Williams’s jurisdictional issues, which we divide into two categories: (1) district court jurisdiction to review the Fund’s decision and related claims and (2) original district court jurisdiction over Williams’s claims.
Judicial Review of Administrative Decisions
Statutory Right of Judicial Review
In Williams I, we held that the retirement statute did not authorize judicial review of the guidelines (i.e., the Fund’s interpretation of former retirement statute section 30) or of the trustees’ decision to deny Williams’s PSC request because Williams was not “disabled” or “eligible for retirement.” Id., slip op. at 5-14. We reaffirm that holding.
The Fund’s board is “in the nature of a public administrative body.” Herschbach v. City of Corpus Christi, 883 S.W.2d 720, 728 (Tex.App.-Corpus Christi 1994, writ denied). Texas law recognizes a right to judicial review of an administrative order only if (1) a statute provides the right, (2) the order adversely affects a vested property right, or (3) the order otherwise violates a constitutional right. Gen. Servs. Comm’n v. Little-Tex Insulation Co., 39 S.W.3d 591, 599 (Tex.2001); see also Cont’l Cas. Co. v. Functional Restoration, 19 S.W.3d 393, 404 (Tex.2002).10 We first consider the Fund’s jurisdiction and then the statutory right of judicial review of Fund actions.11
*427The Fund’s jurisdiction under both current article 6243e.2(1) and repealed article 6243e.2 is broad. The retirement statute expressly grants the managing board of the Fund the powers, inter alia, to:
(1) adopt for the administration of the fund written rules and guidelines not inconsistent with this article;
(2) interpret and construe this article and any summary plan descriptions or benefits procedures, except that each construction must meet any qualification requirements established under section 401 of the [Internal Revenue Code],
(3) correct any defect, supply any omission, and reconcile any inconsistency that appears in this article in a manner and to the extent that the board considers expedient to administer this article for the greatest benefit of all members;
(5) determine all questions, whether legal or factual, relating to eligibility for participation, service, or benefits or relating to the administration of the fund to promote the uniform administration of the fund for the benefit of all members ....
Tex.Rev.Ctv. Stat. Ann. art. 6243e.2(1), § 2(p)(1)-(3), (5) (Vernon 2003) (previously former Tex.Rev.Civ. Stat. Ann. art. 6243e.2, § 2(j)(5)).
The Fund claims that it had exclusive jurisdiction over Williams’s claims. We agree. An agency has exclusive jurisdiction “when a pervasive regulatory scheme indicates that [the Legislature] intended for the regulatory process to be the exclusive means of remedying the problem to which the regulation is addressed.” Subaru of America, Inc. v. David McDavid Nissan, Inc., 84 S.W.3d 212, 221 (Tex. 2002) (quoting Andrew G. Humphrey, Comment, Antitrust Jurisdiction & Remedies in an Electric Utility Price Squeeze, 52 U. Chi. L.R. 1090, 1107 n. 73 (1985)). “[U]nder the exclusive jurisdiction doctrine, the Legislature grants an administrative agency the sole authority to make an initial determination in a dispute.” Id. Article 6243e.2(l), like its predecessor, is a “pervasive regulatory scheme,” governing the establishment and administration of a “Firefighters’ relief and retirement fund in municipalities of at least 1,600,000 population.” Tex.Rev.Civ. Stat. Ann. art. 6243e.2(l). Both Williams’s cause of action and its remedy derive from the statute. When, as here, a cause of action and remedy for its enforcement are derived from statute, the statutory provisions for review are mandatory and exclusive. See id. at 221-22. If an agency has exclusive jurisdiction over a matter, the courts lack subject matter jurisdiction until administrative remedies are exhausted and must dismiss the claims within the agency’s exclusive jurisdiction. Id. at 221. When exhaustion is required, courts have only limited review of the administrative action. Id. That is the case here.
The retirement statute provides for judicial review of Fund decisions as follows: Sec. 2 .... (j) Each decision of the
[Fund’s] board in a matter under the board’s jurisdiction is final and binding as to each affected firefighter, member, and beneficiary, subject only to the rights of appeal specified by this article.
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Appeals of benefit decisions
Sec. 12. (a) A member who is eligible for retirement for length of service or disability or who has a claim for tempo*428rary disability, or any of the member’s beneficiaries, who is aggrieved by a decision or order of the [Fund’s] board, whether on the basis of rejection of a claim or of the amount allowed, may appeal from the decision or order of the board to a district court in the county in which the board is located by giving written notice of the intention to appeal ....
Id. §§ 2(j), 12(a) (Vernon 2003).12
Williams reads section 2(j) to allow judicial review of any board decision, presumably because the decision is “final,” concluding that section 12(a) merely specifies procedures for review of Fund decisions for two non-exclusive classes of appellants (those eligible for retirement or with temporary disability). Williams also argues that section 12(c) — which allows the court to consider evidence not in the administrative record — implies a right of immediate judicial review, because evidence could be lost in the years between the denial of a firefighter’s service credit request and his retirement. See id. § 12(c) (Vernon Supp. 2003). The Fund reads section 12(a) as the only provision providing for judicial review. Accordingly, the Fund argues that Williams may not challenge its credit decision until at least 2003, the earliest possible date he would be “eligible for retirement,” as described in section 12(a).13
While section 2(j) makes the board’s decisions final, it expressly makes those decisions “subject only to the rights of appeal specified by this article.” Id. § 2(j). Section 2(j) does not expressly authorize appeals. Additionally, not every final administrative decision is reviewable by a court. See, e.g., Harris v. Civil Serv. Comm’n for Mun. Employees of the City of Houston, 803 S.W.2d 729, 730 (Tex.App.-Houston [14th Dist.] 1990, no writ); Pruitt v. City of Houston, 548 S.W.2d 90, 93 (Tex.Civ. App.-Houston [1st Dist.] 1977, no writ).
We agree with the Fund that, under the plain language of the Act, the only section allowing a right of judicial review is section 12(a), which limits the statutory right of appeal of Fund decisions to aggrieved “members” who are “eligible for retirement” for length of service or disability or have a claim for temporary disability and any of these members’ beneficiaries. Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), § 12(a). Moreover, as indicated by the caption of section 12 (“Appeals of benefit decisions”) and by the plain language of that section, the statutory right of judicial *429review of Fund decisions is further limited to review of benefit decisions regarding the “rejection of a claim or of the amount allowed.” Id. Article 6243e.2(l) on its face does not allow judicial review of the Fund’s credit determination until Williams meets section 12(a)’s requirements. The fact that evidence might be lost, as Williams contends, does not change the text of the statutes.
Accordingly, we overrule Williams’s jurisdictional issue to the extent he argues that the district court had jurisdiction under the retirement statute to review the Fund’s and trustees’ decisions. We turn next to whether the Fund’s action is beyond its statutorily conferred powers, deprives Williams of vested rights, or otherwise violates a constitutional provision and is thus subject to judicial review in the absence of a statutory right of review. See Little-Tex, 39 S.W.3d at 599; City of Sherman v. Pub. Utility Comm’n of Texas, 643 S.W.2d 681, 686 (Tex.1983).
Right of Judicial Review of Constitutional Issues
Williams contends that (1) the Fund’s actions were beyond their constitutional authority; (2) the Legislature unconstitutionally delegated governmental authority to the Fund; (3) the Fund’s guidelines and PSC determinations were unconstitutional retroactive applications of the law; (4) the Fund’s guidelines were an unconstitutional local or special law; (5) the Fund’s guidelines and their application denied him equal protection; and (6) the Fund’s and the trustees’ application of the Fund’s guidelines to him violated substantive due process.
Standing to challenge the constitutionality of a statute requires that the plaintiff must have suffered some actual or threatened injury under the statute and that he contend that the statute unconstitutionally restricts his own rights. Barshop v. Medina County Underground Water Conservation Dist., 925 S.W.2d 618, 626 (Tex.1996). Williams has pleaded that his rights have been unconstitutionally restricted and that he has been injured by the Fund’s promulgation of its guidelines and by its PSC determination.
We hold that Williams has standing to bring his constitutional claims. We turn, therefore, to the merits of those claims.
Ultra Vires Administrative Decisions
Williams argues that the trial court has jurisdiction because the trustees acted ultra vires in establishing the guidelines for interpreting the retirement statute. Courts generally do not interfere in an administrative agency’s duties and functions, but they will intervene and give declaratory relief when the agency exercises authority beyond its statutorily conferred powers. Nuchia v. Woodruff, 956 S.W.2d 612, 616 (Tex.App.-Houston [14th Dist.] 1997, pet. denied); see City of Sherman, 643 S.W.2d at 683; see also Stauffer v. City of San Antonio, 162 Tex. 13, 344 S.W.2d 158, 160 (1961).
Williams alleges that the Fund “misconstrued” and “adopted rules inconsistent with and in violation of’ the former retirement statute’s section 30. Specifically, he complains that the Fund improperly construed former section 30 to mean that, in order to receive retirement credit, the cities from which he transferred had to have statutory firemen’s retirement funds. Williams argues that (1) the former retirement statute gave the trustees authority to construe the statute only for the “benefit of all members”;14 (2) the guidelines *430harmed Williams and did not benefit any other fund member; (3) the guidelines thus could not have been for the “benefit of all members”; and (4) the trustees, therefore, acted outside their statutory authority.
Article 6243e.2(l) (like its predecessor) clearly gives the Fund the power to adopt written rules and guidelines; to construe the retirement statute; to correct defects, supply omissions, and reconcile inconsistencies; and to determine all questions relating to eligibility for participation, service, benefits, and administration of the Fund. Tex.Rev.Civ. Stat. ANN. art. 6248e.2(l), § 2(p)(l), (2), (3), (5). In this appeal, Williams does not challenge the fact that the Fund has, and has had, this statutory authority. Regardless of his phrasing it in terms of “authority” to interpret at all, the crux of Williams’s argument is that the trustees interpreted the statute in a way they should not have.15 This is a complaint of “getting it wrong,” not of acting outside statutory authority. See Tex. Educ. Agency v. Cypress-Fairbanks Indep. Sch. Disk, 830 S.W.2d 88, 90-91 (Tex.1992); Tex. Comm’n of Licensing & Regulation v. Model Search Am., Inc., 953 S.W.2d 289, 292 (Tex.App.-Austin 1997, no writ);16 N. Alamo Water Supply Corp. v. Tex. Dep’t of Health, 839 S.W.2d 455, 458-59 (Tex.App.-Austin 1992, writ denied).
We hold that Williams’s summary judgment motion neither alleged nor proved a true ultra vires ground. Accordingly, that ground could not fit within the ultra vires exception to the rule that no right of judicial review of an agency decision lies absent statutory authority. We overrule Williams’s ultra vires challenge.
Delegation of Governmental Authority
Williams’s claim that the retirement statute unconstitutionally delegates governmental power to the Fund likewise collapses, as briefed, into an argument about the Fund’s interpretation of the statute, which is clearly within the Fund’s jurisdiction. See Tex.Rev.Civ. Stat. ANN. art. 6243e.2(l), § 2(p)(2) (conferring jurisdiction on the Fund to “interpret and construe this article”). Accordingly, we overrule this issue. See Tex.R.App. P. 38.1(h) (brief must contain clear and concise argument for contention, with citations to authority).
Retroactive Application of Statute
Williams also contends that the Fund’s and the trustees’ interpretation of the retirement statute denying him PSC credit represents an illegal and unconstitutional retroactive application of law. The Fund construed the PSC provision of the firefighter’s retirement-fund statute while Williams’s request for PSC was pending; *431the Legislature subsequently repealed article 6243e.2, under which Williams’s claims were brought, and which he contends supports his interpretation of his right to PSC, and replaced the repealed statute with article 6243e.2(l), which codifies the Fund’s interpretation of the PSC provision.
The Texas Constitution provides, “No ... retroactive law ... shall be made.” Tex. Const, art. I, § 16. This constitutional proscription is, however, limited to “vested rights.” See Subaru, 84 S.W.3d at 219; City of Dallas v. Trammell, 129 Tex. 150, 101 S.W.2d 1009, 1014 (1937). If a statute impairs or takes away vested rights, it may not be made retroactive. Tex. Const, art. I, § 16; Merchants Fast Motor Lines, Inc. v. Railroad Comm’n, 573 S.W.2d 502, 504 (Tex.1978); Reames v. Police Officers’ Pension Bd. of City of Houston, 928 S.W.2d 628, 631(Tex. App.-Houston [14th Dist.] 1996, no writ). Retroactive laws affecting vested rights that are legally recognized or secured are invalid under Texas law. Barshop, 925 S.W.2d at 633. However, no one has a vested right merely in the continuance of present law in relation to a particular subject; the Legislature may change laws so long as they do not destroy or prevent the adequate enforcement of vested rights. Subaru, 84 S.W.3d at 219.
Williams claims that the Fund (1) incorrectly interpreted former article 6243e.2’s PSC requirements and then (2) retroactively applied that incorrect interpretation (which was subsequently codified in article 6243e.2(l)). However, Williams had no vested right to a certain interpretation of the retirement statute, nor did he have a vested right to receive PSC under the terms of former article 6243e.2. There was no constitutional bar to the Fund’s promulgating guidelines for construing the retirement statute while Williams’s request for PSC was pending and applying that interpretation to Williams’s claim for PSC; nor is there a constitutional bar to applying the PSC provisions of current article 6243e.2(l) retroactively to Williams’s claims, since he had no vested right to receive benefits under the (now repealed) retirement statute when he filed his claim.
It is well-established that “an employee who elects to participate in a statutory pension plan does so ‘in contemplation of the reserved right of the Legislature to amend or to repeal laws on which the pension systems are founded.’ ” Reames, 928 S.W.2d at 631-32 (quoting Trammell, 101 S.W.2d at 1012); Duckett v. Board of Trustees, City of Houston Firemen’s Relief & Retirement Fund, 832 S.W.2d 438, 442 (Tex.App.-Houston [1st Dist.] 1992, writ denied). A participant in a statutory pension plan does not have a vested right to receive currently unvested benefits; he has merely an expectancy based on the anticipated continuance of existing law; and this expectancy is subordinate to the right of the Legislature to abolish the pension system or to diminish the benefits of pensioners thereunder. Trammell, 101 S.W.2d at 1014-16; see also Ex parte Abell, 613 S.W.2d 255, 261-62 (Tex.1981); Bd. of Managers of the Harris County Hosp. Dist. v. Pension Bd., 449 S.W.2d 33, 37 (Tex.1969).17
Williams’s claim that the Fund and the trustees violated the constitution by applying the guidelines for interpreting the re*432tirement statute retroactively is without merit.
We overrule this issue.
Special or Local Law
Williams’s claim that the former retirement statute is an unconstitutional special or local law collapses into a complaint about the Fund’s statutory construction in denying him PSC, which, like his claim of unconstitutional delegation of governmental authority, is a matter clearly within the Fund’s jurisdiction. See Tex.Rev.Civ. Stat. ÁNN. art. 6248e.2(l), § 2(p)(l), (2), (3), (5). However, even if properly presented, this claim is without merit.
The Texas Constitution prohibits the Texas Legislature from passing “any local or special law... [r]egulating the affairs of counties, cities, towns, wards or school districts.” Tex. Const, art. Ill, § 56. A special law is, as Williams states, a law limited to a particular class of persons distinguished by some characteristic other than geography, while a local law is one limited to a specific geographic area of the state. Maple Run v. Monaghan, 931 S.W.2d 941, 945 (Tex.1996). “ ‘The primary and ultimate test of whether a law is general or special is whether there is a reasonable basis for the classification made by the law, and whether the law operates equally on all within the class.’ ” Maple Run, 931 S.W.2d at 945 (quoting Rodriguez v. Gonzales, 148 Tex. 537, 227 S.W.2d 791, 793 (1950)).
Former article 6243e.2, under which Williams brings his claims, is, like its successor, article 6243e.2(1), one of a group of statutes promulgated pursuant to article 16, section 67 of the Texas Constitution, which confers power on the Texas Legislature to “enact general laws establishing systems and programs of retirement and related disability and death benefits for public employees and officers.” Tex. Const. art. 16, § 67. The classification made by the statute at issue in this case, providing for the establishment and administration of a “Firefighters’ relief and retirement fund in municipalities of at least 1,600,000 population,” as stated in its caption, is reasonable in light of the series of statutes that make similar provision for firefighters in the other population centers of the state, and it operates equally on all members of the Fund in the same position. It is thus a constitutional general law, not an unconstitutional special law, as Williams contends. See Bd. of Managers of Harris County Hosp. Dist., 449 S.W.2d at 38 (act “relating to Municipal pension systems in all cities of this state having a population in excess of nine hundred thousand (900,-000) inhabitants” was not unconstitutional local or special law, despite applying only to Houston when passed).
We overrule this issue.
Equal Protection
Williams also challenges the provisions for appeal of the retirement statute on equal protection grounds. In his petition, he argues that the statute violates the federal Equal Protection Clause18 because
[u]nder the statute, each firefighter’s right to appeal is dependent on when he will be “eligible for retirement.” Consequently, some firefighters will be able to appeal the same final decision, made at the same time, by the same adjudicator many years before Williams could appeal that same final decision. There is no legitimate state interest that is furthered by classifying persons in a manner that gives some the right to appeal months or even years before others could appeal the same final decision en*433tered on the same day by the same adjudicator.
(Emphasis in original; citations omitted.); see Lindsey v. Normet, 405 U.S. 56, 77, 92 S.Ct. 862, 876, 31 L.Ed.2d 36 (1972) (“When an appeal is afforded ... it cannot be granted to some litigants and capriciously or arbitrarily denied to others without violating the Equal Protection Clause.”).
Williams’s argument is without merit. It fails to recognize the rational distinction between (1) a statutory grant of the right of judicial review of agency decisions regarding claims for vested benefits and (2) a statutory denial of the right of appeal to persons who have no vested interest in receiving benefits. When, as here, “the classification does not impinge on a fundamental right, or distinguish between persons on a suspect basis such as race or national origin, it is valid as long as it is rationally related to a legitimate state purpose.” Ford Motor Co. v. Sheldon, 22 S.W.3d 444, 451 (Tex.2000). See Owens Corning v. Carter, 997 S.W.2d 560, 581 (Tex.1999) (“[W]e must uphold the law if we can conceive of any rational basis for the Legislature’s action.”).
Deferring judicial review until a firefighter actually seeks retirement benefits prevents review that may be merely advisory or dependent upon future contingencies. See Patterson v. Planned Parenthood of Houston & Southeast Tex., Inc., 971 S.W.2d 439, 442, 443 (Tex.1998) (holding that ripeness is threshold issue that implicates subject matter jurisdiction; it emphasizes need for concrete injury for presentation of justiciable claim; and case is not ripe when its resolution depends on contingent or hypothetical facts or on events that have not yet come to pass); Duckett, 832 S.W.2d at 442 (holding that inchoate interest of beneficiary of Firemen’s Relief and Retirement Fund does not ripen into property interest until occurrence of contingency upon which that interest depends). This is a rational basis to uphold the law.
We overrule this issue.
Substantive Due Process
Williams further contends that “[s]ubstantive due process proscribes arbitrary or capricious laws that adversely affect vested rights.” See City of Amarillo v. Hancock, 150 Tex. 231, 239 S.W.2d 788, 791 (1951) (holding that, for plaintiff to bring himself within protection of due process claims, right adversely affected by action of administrative body must be vested property right). Because we have held that, at the time he brought his claims, Williams had no vested right to the contested pension benefits under the retirement statute, his substantive due process argument necessarily fails.
We overrule this issue.
Inherent Right of Judicial Review of Legal Issues
The dissent would hold that the district court had inherent jurisdiction under article V, section eight of the Texas Constitution to interpret “pure questions of law” relative to the retirement statute, regardless of the Fund’s jurisdiction over legal questions. It invokes the constitutional grant of original jurisdiction to the district courts to determine questions of law, “except ... where exclusive ... jurisdiction may be conferred by this Constitution or other law on some other court, tribunal, or administrative body.” Tex. Const, art. V, § 8 (emphasis added).
The dissent would hold that the retirement statute did not give the Fund exclusive jurisdiction to interpret the retirement statute because the statute did not include the term “exclusive”; therefore, the district court retained jurisdiction *434over the legal questions Williams raises. To reach this conclusion, however, the dissent must ignore the comprehensive statutory scheme from which all of Williams’s rights derive, including the broad legislative grant of powers to the Fund to interpret and to construe the statute; the broad grant of power to the Fund to determine all legal and factual questions relating to eligibility for participation, service, and benefits or relating to the administration of the Fund; and the legislative limitation on the statutory right of review of Fund determinations. The dissent also ignores the purpose of the exclusive jurisdiction doctrine, which is to require an aggrieved party to comply with statutory provisions before the jurisdiction of the trial court attaches and to limit review of administrative action. Subaru, 84 S.W.3d at 221. It is undisputed that Williams did exhaust his administrative remedies; therefore, the real question here is the scope of the right to seek judicial review of administrative decisions once administrative remedies have been exhausted.
The dissent’s expansive view of the inherent jurisdiction of district courts to review agency actions, even in the absence of a statutory right of review or a constitutional question, eviscerates the doctrine of exclusive agency jurisdiction and the power of the Legislature to limit statutory review of administrative decisions. Even if an agency’s jurisdiction expressly includes the interpretation of legal and factual issues, as here, persons aggrieved by agency action and lacking a statutory right of review could always perform an end run around the agency by asserting the inherent jurisdiction of the judicial system to interpret the law. This is not the law. See, e.g., Continental Cas. Co. v. Functional Restoration Assocs., 19 S.W.3d 393, 404 (Tex.2000) (holding that, when Legislature remains silent or denies right of judicial review, administrative decisions may nevertheless be attacked in court if they adversely affect vested property right or otherwise violate provision of state or federal constitution); Little-Tex, 39 S.W.3d at 599.19
The potential impact of the dissent’s expansive interpretation of district court jurisdiction over questions of law becomes evident when the dissent asserts the authority of the district court to reinstate and to interpret repealed law in a way that contradicts the agency interpretation of that law, contradicts current law, and supports Williams’s claims. By permitting the court (under the canon of inherent jurisdiction) not only to second guess an administrative agency on matters within the agency’s express jurisdiction, and as to which the governing statute expressly precludes judicial review by persons with non-vested rights, the dissent would allow a participant in a statutory pension plan to freeze non-vested rights in time and to subject them to judicial enforcement. This view is contrary to long-established principles of law that subject the expectations of statutory pension plan participants to the right of the Legislature to repeal or amend the law and to decrease or eliminate non-vested benefits. See Trammell, 101 S.W.2d at 1014-16. Even more fundamentally, the dissent would place the district courts in the untenable position of second-guessing the Fund’s exercise of its statutorily conferred power to construe the statute and to promulgate guidelines without *435the benefit of either the Fund’s expertise or its knowledge of how the construction of one section of the retirement statute impacts the administration of the Fund for the “greatest benefit of all members.” See Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), § 2(p)(3), (5).
We, therefore, disagree with the dissent’s view that the district courts have inherent jurisdiction over questions of law within the Fund’s jurisdiction to decide in the absence of a statutory right of review or a constitutional issue.
Original District Court Jurisdiction
District Court Jurisdiction over Williams’s Claims Under the Texas Trust Code
Williams also argues that section 115.001(a) of the Texas Trust Code confers both original and exclusive jurisdiction on the district courts “to decide all issues concerning the [pension] Fund:
Except as provided by [a sub-section inapplicable here], a district court has original and exclusive jurisdiction over all proceedings concerning trusts, including proceedings to: (1) construe a trust instrument....”
Tex. Prop.Code Ann. § 115.001(a)(1) (Vernon Supp.2003). He correctly observes that the Trust Code applies generally to a pension trust. See id. § 121.003 (Vernon 1995); see also id., § 121.001(a) (Vernon 1995) (defining a pension trust). The Fund and the trustees respond that section 115.001(a) cannot create subject matter jurisdiction over Williams’s claims because that section “contains merely a general grant of jurisdiction for actions involving trusts [but not] ... language suggesting a legislative intent to waive sovereign immunity for public pension funds.” Assuming without deciding that the Trust Code applies to Williams’s claims, we agree with the Fund.
“Absent specific legislative authorization, persons aggrieved by an administrative agency’s action have no recourse in the courts due to the first principle of governmental immunity — the state as sovereign cannot be sued without its permission. The doctrine bars a suit for judicial review against the state unless the state has expressly given its consent to be sued.” Southwest Airlines Co. v. Tex. High-Speed Rail Auth., 867 S.W.2d 154, 157 (Tex.App.-Austin 1993, writ denied) (citations omitted). Waiver of sovereign immunity from suit must be clear and unambiguous. See, e.g., Fed. Sign v. Texas S. Univ., 951 S.W.2d 401, 405 (Tex.1997). The general language of section 115.001(a) of the Trust Code does not provide the necessary waiver of sovereign immunity from suit.
We overrule this issue.
District Court Jurisdiction over Williams’s Common Law Claims
Finally, Williams argues that he is entitled to bring common law claims against the trustees for conspiracy, fraud, breach of fiduciary duty and breach of the duty of good faith and fair dealing arising in connection with their interpretation and application of the retirement statute. The trustees respond that they are immune from such claims.20
Governmental immunity from suit bars an action against the state unless the state expressly consents to the suit. Texas Dep’t of Transp. v. Jones, 8 S.W.3d 636, 638 (Tex.1999). A party suing a governmental entity must establish the state’s consent, by reference either to a statute or to express legislative permission. Id. Absent such consent, a trial court lacks sub-*436ject matter jurisdiction. Id. Here, there was no consent to suit by the state. Therefore, the district court lacked subject matter jurisdiction over Williams’s common law claims against the Fund, a state agency. Public officials, however, enjoy more limited immunity.
Public officials are entitled to official immunity from personal liability in performing (1) discretionary duties (2) in good faith (3) within the scope of their authority. Kassen v. Hatley, 887 S.W.2d 4, 9 (Tex.1994). If public officials are immune from suit, they are not personally liable to the claimant under Texas law. City of Lancaster v. Chambers, 883 S.W.2d 650, 658 (Tex.1994). The rationale for official immunity is that the public suffers if government officers, who must exercise judgment and discretion in their jobs, are subject to civil lawsuits that second-guess their decisions. Id. “ ‘If an action involves personal deliberation, decision and judgment, it is discretionary.’ ” Kassen, 887 5.W.2d at 9 (quoting City of Lancaster, 883 S.W.2d at 654).
The trustees’ interpretation of the retirement statute, their promulgation of guidelines, their administration of the Fund, and their denial of Williams’s claim for PSC — the actions that Williams alleges give rise to his common law claims — are all acts requiring deliberation, decision, and judgment within the scope of the trustees’ authority under the retirement statute. See Tex.Rev.Civ. Stat. Ann. art. 6243e.2(l), §§ 2(j), 2(p), 12(a). The only question, therefore, is whether the trustees’ exercise of discretion was made in “good faith.”
The test for good faith is one of objective legal reasonableness, without regard to whether the government official acted with subjective good faith. City of Lancaster, 883 S.W.2d at 656. To determine objective legal reasonableness, the courts “look to whether a reasonable official could have believed his or her conduct to be lawful in light of clearly established law and the information possessed by the official at the time the conduct occurred.” Id. Good faith immunity applies even if the official misinterprets or violates the law or incorrectly adjudicates a claim. See Campbell v. Jones, 153 Tex. 101, 264 S.W.2d 425, 427 (1954).
Williams’s argument that the trustees did not act in good faith derives solely from his contentions that the trustees misconstrued the statute and that “no reasonable person could have believed it was lawful to deny Williams PSC for the reason he was denied PSC, or that it was reasonable to misleadingly tell him he could not transfer PSC.” The trustees testified by affidavit that they believed their conduct to be lawful in light of the powers conferred on them by the retirement statute to adopt guidelines for the administration of the fund, “to participate in the Board’s exercise of its functions, which include administering the Fund, construing the act, and determining all questions relating to eligibility for participation,” and to “participate in the Board’s adjudication of the prior service credit application.” This belief was clearly reasonable, given the jurisdiction expressly conveyed to the board by statute. See Tex.Rev.Civ. Stat. Ann. art. 6243e.2, §§ 2(j), 2(p)(1), (2), (3), (5). Therefore, the trustees are entitled to official immunity.
The dissent, by contrast, would hold that, to prove the objective “good faith” element of official immunity, the trustees had to prove that the thought processes underlying their interpretation of the statute were “objectively reasonable,” given “Williams’s allegations that the trustees had purposefully changed their interpretation for the sole and improper purpose of defeating pending PSC requests.” The *437dissent would thus make statutory appointees vested with the power of interpreting and administering statutes personally liable for getting the interpretation wrong unless they prove that their motives are pure.
The dissent misconstrues the standard of proof of objective good faith, namely, “whether a reasonable official could have believed his or her conduct to be lawful.” City of Lancaster, 888 S.W.2d at 656. The officials’ affidavits conform exactly to the standard of proof. Instead, the dissent would place a burden on officials to publicly justify their reasoning that can be nothing other than a public confession of the officials’ thought processes, establishing a subjective standard of proof of good faith that has been expressly rejected by the Texas Supreme Court. Id. Such a standard would also undermine the rationale for official immunity, ie., that the public suffers if government officers whose duties include exercising judgment and discretion are subjected to civil lawsuits that second-guess their decisions. Id. at 658. We therefore disagree with the dissent’s analysis of this issue.
We hold that the trustees are entitled to official immunity with respect to Williams’s common law claims against them. We overrule this issue.21
SUMMARY JUDGMENT FOR THE CITY
Williams asserted only his common law claims (conspiracy, fiduciary-duty breach, good-faith-and-fair-dealing breach, and fraudulent misrepresentation and concealment) against the City, two of whose employees are designated by the retirement statute to sit on the Fund’s board. The trial court granted the City’s motion to dismiss or, alternatively, for rule 166a(c) summary judgment on those claims.
A municipality, as a political subdivision of the state, is not liable for the acts of its officers or employees committed in the course of performing governmental functions unless the municipality’s common law immunity is waived by the Texas Tort Claims Act (“TTCA”).22 City of Lancaster, 883 S.W.2d at 658. The relevant provision of the TTCA waives the sovereign immunity of municipalities for governmen*438tal functions only as to (1) “property damage, personal injury, and death proximately caused by the wrongful act or omission or the negligence of an employee acting within the scope of employment” if (2) the damage, injury, or death arises from the operation or use of a motor vehicle or motor-driven equipment and (3) “the employee would be personally liable to the claimant according to Texas law.” Id. § 101.021 (Vernon Supp.2003). The TTCA does not waive the City’s immunity to the type of common law claims asserted by Williams. See Thayer v. Houston Mun. Employees Pension Sys., 95 S.W.3d 573, 576-77 (Tex.App.-Houston [1st Dist.] 2002, no pet.) (holding that municipal pension system and board, as state-created governmental entities, are generally immune from tort liability). Therefore, the City is immune from judgment on Williams’s common law claims, assuming that those claims challenge its governmental functions.
Governmental functions of a municipality are those that are “enjoined on a municipality by law and are given it by the state as part of the state’s sovereignty, to be exercised by the municipality in the interest of the general public.... ” Tex. Civ. PRAC. & Rem.Code Ann. § 101.0215(a) (Vernon Supp.2003). Williams concedes in his petition that the provision under which he seeks PSC was created by statute, specifically former article 6243e.2, which he acknowledges was superseded by article 6243e.2(1) in November 1997. He further acknowledges that, although the Fund is independent of both the City and the Houston Fire Department, its governing board of trustees, by statute, includes the City’s mayor or his representative and the City’s treasurer; that the amount of contributions from members and from the City financing the Fund is mandated by statute; and that the terms under which firefighters’ pensions vest and PSC is determined are likewise mandated by statute. See Tex.Rev.Civ. Stat. Ann. art. 6243e.2(l), §§ 2(b)(1), (2); 4; 13(c), (d); 16. The retirement statute, in turn, is promulgated pursuant to the Texas Constitution. Tex. Const, art. XVI, § 67(a) (providing for the enactment of “general laws establishing systems and programs of retirement and related disability and death benefits for public employees and officers”).
The administration of the Fund and the promulgation and interpretation of the guidelines for its administration are thus expressly “enjoined” on the City by statute; and these powers are given to the Fund as part of the sovereignty of the state, by legislative authority, to be exercised by the board of trustees and the City for the general benefit of all who fall within the scope of the statute. They are thus governmental functions. See Tex. Civ. Prac. & Rem.Code Ann. § 101.0215(a). The City is, therefore, entitled to governmental immunity from suit on Williams’s common law claims.
Williams, however, argues that the actions he complains about are proprietary functions of the City, rather than governmental functions. See Herschbach, 883 S.W.2d at 730 (“An exception to the general rule of governmental immunity is that a municipality is not immune from its proprietary functions.”). Proprietary functions are those “that a municipality may, in its discretion, perform in the interest of the inhabitants of the municipality.” See Tex. Civ. Prac. & Rem.Code Ann. § 101.0215(b) (Vernon Supp.2003). Williams cites to cases which he contends support his argument that the interpretation and administration of a statutorily created pension fund are proprietary functions of the City, for which the City and those trustees who are City employees are not immune, namely, Herschbach and City *439of Dallas v. Arnett, 762 S.W.2d 942 (Tex. App.-Dallas 1989, writ denied).23
In Arnett, the Dallas Court of Appeals addressed the question of whether the operation of a police and fire fighter’s pension fund was a governmental or proprietary function of the municipality. See id., 762 S.W.2d 942. Analogizing from the provision of health insurance to municipal employees, the court held that the provision of pension benefits was a proprietary function. Id. at 953. We believe that Arnett was wrongly decided for two reasons. First, the court based its conclusion on “the closely analogous function of providing health insurance to municipal employees” by a self-insured municipality, which the Texas Supreme Court had designated a proprietary function in Gates v. City of Dallas, 704 S.W.2d 737, 739 (Tex. 1986). Arnett, 762 S.W.2d at 953. In the context of indicia of proprietary versus governmental functions, the analogy drawn in Arnett is false. There is no statutory “enjoinder” that a self-insured municipality provide health benefits to municipal employees, while there is an express statutory obligation under article 6243e.2(1) for the City to manage the Fund for the benefit of firefighters. See Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), §§ 2(p) 3, 5. Second, although the Arnett court recognized that “a number of administrative and financial interconnections exist between the City and the Fund” under the governing statute, article 6243a, the court failed to consider the statutory origins of the city’s power to administer the fund and thus failed to address either governmental immunity in general or the TTCA’s limited waiver of immunity.
In Herschbach, the Corpus Christi Court of Appeals wrestled with the issue of whether the City of Corpus Christi’s calculation of the average monthly salary of firefighters was a governmental function or a proprietary function subject to tort and breach-of-contract claims. See id., 883 S.W.2d 720. The court observed that section 10A-3 of the relevant statute, article 6243e, was optional in its coverage (it applied to all cities “which adopt the provisions of this section”). Id. at 731 (emphasis added). Based on that conclusion, the court held that “the state did not enjoin section 10A-3 upon the City; [the statutory language] lacks the elements of command necessary for enjoining a function on a municipality.” Id. at 731.
Article 6243e.2(l) is distinguishable from the statute at issue in Hersch-bach in that article 6243e.2(l) has no optionality provision. Nevertheless, we disagree with the holdings in Arnett and Herschbach that a municipality’s exercise of statutorily prescribed functions with respect to a statutory pension plan is a propriety function of the municipality. Such a construction not only contradicts the definition of governmental functions, but is absurd when (1) the result is to hold a municipality liable in tort for the exact same acts of statutory interpretation and administration for which the statutorily created board in which it participates in interpreting and administering a statutorily created pension fund under the exact same statute enjoys sovereign immunity and (2) a further result is to hold two of the members of a statutorily created board personally liable in tort for the exact same actions in their statutorily enjoined capacity as the mu*440nicipality’s representatives on the board of trustees for which they and the other trustees enjoy official immunity wider the exact same statute in their exact same capacity as Fund trustees. Courts should not read a statute — here, the TTCA — in such a way as to create an absurd result. Barshop, 925 S.W.2d at 629; Chevron Corp. v. Redmon, 745 S.W.2d 314, 316 (Tex.1987); Mueller v. Beamalloy, Inc., 994 S.W.2d 855, 860 (Tex.App.-Houston [1st Dist.] 1999, no pet.).
We overrule Williams’s challenges to the dismissal of his claims against the City.
REMEDY
Although we overrule Williams’s issues, there is jurisdictional error requiring modification. Because the trial court properly determined that it had no subject matter jurisdiction over certain of Williams’s claims — an issue that the court would have had to reach before determining the merits — it erred in rendering a take-nothing judgment on them, rather than dismissing those claims without prejudice. See Functional Restoration Assocs., 19 S.W.3d at 406; see also Bell v. State Dep’t of Highways & Pub. Transp., 945 S.W.2d 292, 295 (TexApp.-Houston [1st Dist.] 1997, writ denied). A court may not rule on the merits of claims over which it has no jurisdiction. Accordingly, we modify the judgment to reflect dismissal of Williams’s statutory and common law claims against the Fund, the trustees, and the City for lack of subject matter jurisdiction. See Tex. R.App. P. 43.2(b).
CONCLUSION
We modify the judgment rendered on Williams’s statutory and common law claims against the Fund, the trustees (in either capacity), and the City to dismiss those claims without prejudice for lack of subject matter jurisdiction. We affirm the judgment as so modified.
Justice TAFT, concurring in part and dissenting in part.
Justice COHEN, who was a member of the panel on original submission in this cause and who retired before this opinion’s issuance, not participating on rehearing.
. Act of May 27, 1975, 64th Leg., R.S., ch. 432, § 30, 64 Tex. Gen. Laws 1135, 1148 [hereinafter “former Tex.Rev.Civ. Stat. Ann. art. 6243e.2, section 30”], repealed by, Act of May 21, 1997, 75th Leg., R.S., ch. 1268, § 3, 75 Tex. Gen. Laws 4794, 4811 (current version at Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), § 16(a) (Vernon 2003)).
. Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), "Historical and Statutory Notes” (Vernon 2003).
. Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), § 16(a) (Vernon Supp.2003) (emphasis added).
. The Fund moved to dismiss Williams's claims for want of subject matter jurisdiction and, alternatively, for summary judgment against those claims on jurisdictional grounds as well as on the merits; the jurisdictional arguments under both the Fund’s motions were identical. The trial court ruled on the dismissal grounds, rather than on those for summary judgment.
. Technically, there is no appellate jurisdiction to review an agency determination on the merits, only a suit for judicial review of that determination, which is an original proceeding in the trial court. See Everett v. Tex. Educ. Agency, Div. of Teacher Records, 860 S.W.2d 700, 703 (Tex.App.-Austin 1993, no writ), disagreed with on other grounds, Nueces Canyon Consol. Indep. Sch. Dist. v. Cent. Educ. Agency, 917 S.W.2d 773, 775-76 (Tex.1996). We use the term "judicial review," therefore, where Williams used the term "appellate.”
.The Fund filed one summary judgment/dismissal motion and three supplements; the trustees filed one summary judgment motion; and the City filed one summary judgment/dismissal motion. The final judgment recites that the trial court considered and granted each of these motions. We thus consider all grounds (except for the Fund’s dismissal grounds, which we previously reviewed in the *424interlocutory appeal) and evidence in support of each of those motions. The final judgment also recites that Williams’s “motion for partial summary judgment’’ was denied. Williams actually filed four motions for partial summary judgment. Because Williams challenges their denial on appeal, we consider all grounds raised in all four of Williams's partial summary judgment motions.
. Williams did not always clearly distinguish, either here or below, his summary judgment and appellate challenges asserted against the trustees individually from those asserted against them in their official capacities. However, given the nature of Williams’s claims, we conclude that the only claims that could be asserted against the trustees individually are the common law claims.
. Specifically, Tex. Prop.Code Ann. § 115.001(a) (Vernon Supp.2003).
. A court may also review an administrative decision when the agency exercised authority beyond its statutorily conferred powers. City of Sherman v. Pub. Utility Comm’n of Texas, 643 S.W.2d 681, 683 (Tex.1983). We construe a claim that an agency has rendered an ultra vires decision as a claim that the agency has violated the constitutional separation of powers. See Barshop v. Medina Underground Water Conservation Dist., 925 S.W.2d 618, 635 (Tex. 1996).
. Williams challenged the judicial review provisions of the former retirement statute, article 6243e.2. We consider the judicial review provisions of the current retirement statute, article 6243e.2(1), because the judicial review provision of former article 6243e.2, section 17, is materially the same as the judicial review provisions in current article 6243e.2(1), sections 2(j) and 12(a). The general rule that statutory amendments are presumed not to apply retroactively does not apply when an amendment is merely procedural or remedial. Reames v. Police Officers’ Pension Bd. of City of Houston, 928 S.W.2d 628, 631(Tex. App.-Houston [14th Dist.] 1996, no writ). "A remedial matter pertains to the practice and procedure by which substantive law is made.” Id. Likewise, we consider the *427jurisdictional provisions of the current retirement statute because the language of the statute regarding the jurisdiction of the Fund is materially the same under section 2(j) of former article 6243e.2 and section 2(p) of the current article.
. The provisions for appeal in the current statute, sections 2(j) and 12(a), do not differ materially from the provision for appeal in the former statute, which was applicable when Williams's claims arose, namely section 17:
Sec. 17. (a) Any member possessing the qualifications required for retirement for length of service or disability or having claim for temporary disability, or any of his beneficiaries, who deems himself aggrieved by the decision or order of the board of trustees, whether because of rejection or the amount allowed, may appeal from the decision or order of the board to a district court in the county where the board is located by giving written notice of the intention to appeal. The notice shall contain a statement of the intention to appeal, together with a brief statement of the grounds and reasons why the party feels aggrieved....
Act of May 27, 1975, 64th Leg., R.S., ch. 432, § 17, 1975 Tex. Gen. Laws 1135, 1145, repealed by Act of May 21, 1997, 75th Leg., R.S., ch. 1268, § 3, 1997 Tex. Gen. Laws 4794, 4811 (current version at Tex.Rev.Civ. Stat Ann. art. 6243e.2(1), §§ 2(j), 12(a) (Vernon 2003)).
. If Williams's interpretation of former section 30 were to apply, he would be eligible to retire in 2003. See Tex.Rev.Civ. Stat. Ann. art. 6243e.2(1), § 4(a) (Vernon Supp.2003). If the Fund’s interpretation were correct, Williams would not be eligible to retire until 2010. See id.
. As noted above, the former and current retirement statutes provide that the Fund’s *430board has the power to "correct any defect, supply any omission, and reconcile any inconsistency that may appear in this [Act] in a manner and to the extent that the board considers expedient to administer this [Act] for the greatest benefit of all members.” Former Tex.Rev.Civ. Stat. Ann. art. 6243e.2, § 2(j)(3) (now appearing at Tex.Rev.Civ. Stat. Ann. art. 6243e.2(l), § 2(p)(3) (Vernon 2003)) (emphasis added).
. Williams's petition alleged that “the Fund misconstrued ... [and] ... adopted and applied rules inconsistent with and in violation of [the article],” and the crux of his arguments here and below was that the Fund misconstrued the article.
. "The foregoing impediments to declaratory relief are not avoided by a claim that the opinion given by the Commission’s general counsel and director of enforcement is ultra vires. They had the undoubted authority to interpret the Act's provisions and to make a decision in that regard. That they ‘might decide ‘wrongly’ ... does not vitiate' their authority to make a decision.” Id. at 292 (quoting N. Alamo Water Supply Corp. v. Tex. Dep’t of Health, 839 S.W.2d 455, 459 (Tex. App.-Austin 1992, writ denied)).
. We specifically note that article 6243e.2(l) makes no reference to vested benefits and has no provision for the non-forfeiture of retirement benefits after a statutorily specified term of service.
. See U.S. Const, amend. XIV.
. The dissent faults us for ignoring Dubai Petroleum Co. v. Kazi, 12 S.W.3d 71 (Tex. 2000). Kazi holds that the district courts are presumed to have subject matter jurisdiction unless a showing can be made to the contrary. Id. at 74-75. Our discussion of the jurisdictional issues in this case is directed precisely at showing why the district courts do or do not have subject matter jurisdiction over Williams's claims.
. Williams abandoned his common law claims against the Fund.
. The Fund and the trustees also argue for the first time on appeal that the alleged res judicata effect of our holding in Williams I deprived the trial court of jurisdiction over Williams's challenges to the adoption of the guidelines and the PSC determination. First, res judicata is an affirmative defense on the merits, not a jurisdictional bar. See Int’l Bank of Commerce of Laredo v. City of Laredo, 608 S.W.2d 267, 269 (Tex.Civ.App.-San Antonio 1980, writ dismissed). Second, an interlocutory judgment in the same suit cannot have a res judicata effect because such a judgment is not final. See Frost Nat’l Bank v. Burge, 29 S.W.3d 580, 595 (Tex.App.-Houston [14th Dist.] 2000, no pet.). Williams also argues that the Fund is prevented by stare decisis or is collaterally estopped from denying his claim for PSC because of a prior district court decision, Holleman v. Houston Firemens Relief and Retirement Fund, Cause No. 92-28684, in the 80th Judicial District Court of Harris County. First, we are not bound by district court decisions. Second, collateral estoppel, or issue preclusion, prevents the relitigation of particular issues when "(1) the facts sought to be litigated in the second action were fully and fairly litigated in the first action; (2) those facts were essential to the judgment in the first action; and (3) the parties were cast as adversaries in the first action.” Sysco Food Servs., Inc. v. Trapnell, 890 S.W.2d 796, 801 (Tex.1994); Barr v. Resolution Trust Corp., 837 S.W.2d 627, 628 (Tex. 1992). The district court in Holleman did not interpret the retirement statute applicable to Williams's claims or determine Williams’s eligibility for PSC, and neither the parties nor the issues are the same here; collateral estop-pel does not apply.
. See Tex. Civ. Prac. & Rem.Code Ann. §§ 101.001-.109 (Vernon 1997 & Supp.2003).
. Williams also cites Muzquiz v. City of San Antonio, 520 F.2d 993 (5th Cir.1975), and Bolen v. Board of Firemen, Policemen, and Fire Alarm Operators’ Trustees, 308 S.W.2d 904 (Tex.Civ.App.-San Antonio 1958, writ ref'd). Neither of these cases addresses the proprietary functions of municipalities.