Opinion
REYNOSO, J.The issue presented by this case is the constitutionality of provisions in Public Resources Code section 25531 for judicial review exclusively by this court of certain decisions of the State Energy Resources Conservation and Development Commission (Energy Commission) pertaining to construction projects for which the Public Utilities Commission (PUC) must issue a certificate of public convenience and necessity.1 We shall conclude that the statutory provisions are a proper exercise of the Legislature’s broad powers over matters within the purview of the PUC.
*364The Warren-Alquist State Energy Resources Conservation and Development Act (Energy Act) (§ 25000 et seq.), enacted in 1974, established the Energy Commission (§ 25200) to implement announced legislative objectives of encouraging and coordinating research into energy problems, promoting energy conservation, and assuring statewide environmental, public safety, and land use goals (see §§ 25001-25007). Among the Energy Commission’s duties is that of exercising its “exclusive power to certify all sites and related facilities,” i.e., facilities by which electricity is generated from thermal energy, together with associated electric transmission lines. (§§ 25500, 25119, 25110, 25120, 25107.)2 Section 25500 provides that the Energy Commission’s certificate supersedes any statute, ordinance, regulation, or permit requirement of any state, local, or regional agency or (insofar as permitted by federal law) of any federal agency. (Fn. 2, ante.)
If the Energy Commission’s certificate is issued to a public utility, however, construction of the certified facility cannot proceed without issuance by the PUC of a certificate of public convenience and necessity. (Pub. Util. Code, § 1001.) In 1971, three years before adoption of the Energy Act, Public Utilities Code section 1001 was amended to require the PUC to add the following factors to those it considers as a basis for granting such a *365certificate: community, historical and aesthetic values; recreational and park areas; and influence on the environment. (Stats. 1971, ch. 68, § 3, ch. 1631, §§ 1, 3.) The 1974 Legislature, in addition to enacting the Energy Act, further amended Public Utilities Code section 1001 to provide that with respect to a thermal powerplant or electric transmission line for which an Energy Commission certificate is required, (1) the PUC may not grant a certificate of public convenience and necessity until after the Energy Commission certificate has been obtained and (2) the latter certificate is conclusive as to the matters it determines and supplants consideration by the PUC of the additional factors prescribed in the 1971 amendment. (Stats. 1974, ch. 1195, § 10.) In 1981 the substance of these provisions was transferred from section 1001 to section 1002 of the Public Utilities Code. (Stats. 1981, ch. 573, §§ 2, 3.)3
The Energy Act prescribes procedures for judicial review of Energy Commission decisions and provides that apart from those procedures no court has jurisdiction over Energy Commission matters except to enforce the commission’s decisions. (§ 25531, subd. (c).)4 The general judicial review provision is for challenge of commission decisions by way of writ of mandate filed in the superior court. (§ 25901.)5 The sole exception is the provisions *366in section 25531 for judicial review of commission decisions on applications for certification of sites and related facilities that also must be certified by the PUC. That limited class of Energy Commission decisions is made subject to judicial review in the same manner as PUC decisions on the application for a certificate of public convenience and necessity for the same site and related facility. (§ 25531, subds. (a) and (b).)6 Since those PUC decisions may be reviewed only by this court (Pub. Util. Code, §§ 1756-1759), the operative effect of section 25531 is to give this court exclusive jurisdiction over Energy Commission decisions that comprise a necessary ingredient of the certificate issued by the PUC. The issue posed by this case is whether section 2553l’s provision for our exclusive jurisdiction is allowed by the California Constitution.
Before us is a petition by the County of Sonoma for review of a decision by respondent Energy Commission granting real party in interest Pacific Gas and Electric Co. (PG&E) certification of a geothermal power plant in Lake County and a related 43-mile electric transmission line in Sonoma County. The petition claims numerous defects in the decision but prays in the alternative that we deny the petition for lack of jurisdiction on the ground that the judicial review provisions of section 25531 are unconstitutional.
Petitioner has not briefed the merits of its challenge to the decision, and its counsel stated at oral argument that if this court were to rule that section 25531 and related provisions divesting all other courts of jurisdiction to review commission certification of electric power facilities are constitutionally valid, petitioner would withdraw its request for any further review and concede that the commission’s present decision may stand.
Section 25903 provides that if the provision of section 25531 for judicial review of Energy Commission certification decisions exclusively by this *367court are held invalid, such decisions shall be reviewed by the superior court.7 We are advised that petitioner has commenced a mandate proceeding in the superior court so as to obtain review of the present commission decision there if petitioner’s challenge to our jurisdiction under section 25531 should succeed.
Petitioner contends that to confine to this court alone the jurisdiction to review the Energy Commission’s decision granting the certification to PG&E, in accordance with section 25531 and related sections, infringes on the jurisdiction of the superior courts granted by article VI, section 10, of the California Constitution.8 Petitioner argues that sections 1756 to 1759 of the Public Utilities Code, giving this court exclusive jurisdiction to review decisions of the PUC, are valid only by virtue of article XII of the Constitution, which gives the Legislature broad powers to confer authority upon the PUC and to provide for judicial review of its decisions, and that because article XII does not specify the Energy Commission or any other commission or agency except the PUC, it does not allow the legislation here in question. We think, however, that the close relationship between the functions of the PUC and the narrow class of Energy Commission decisions affected by section 25531 brings that section’s judicial review provisions within the broad legislative authority over PUC matters conferred by article XII.
That article gives the Legislature comprehensive powers over PUC matters. Section 5 of article XII, adopted in 1974, provides that “[t]he Legislature has plenary power, unlimited by the other provisions of this constitution but consistent with this article, to confer additional authority and jurisdiction upon the [PUC and] to establish the manner and scope of review of commission action in a court of record . . . .” Section 5 in effect restates provisions in former sections 22 and 23 of article XII, originally adopted in 1911. (See article XII, section 9, providing that “[t]he provisions of this article restate provisions of the Constitution in effect immediately prior to the effective date of this amendment and make no substantive *368change.”) Former sections 22 and 23 both declared the power of the Legislature to confer powers respecting public utilities upon the PUC to be “plenary” and “unlimited by any provision of this Constitution.” The foregoing provisions empower the Legislature not only to restrict judicial review of PUC decisions, as by eliminating the jurisdiction of courts other than this one to conduct such review (Pacific Telephone etc. Co. v. Eshleman (1913) 166 Cal. 640, 689, 701 [137 P. 1119]), but also to expand the scope of this court’s review powers beyond the jurisdiction provided in article VI of the Constitution (Southern Calif. Edison Co. v. Railroad Com. (1936) 6 Cal.2d 737, 748 [59 P.2d 808]).
In electing to exercise these constitutional powers by channeling judicial review of PUC decisions directly and exclusively to this court (Pub. Util. Code, §§ 1756-1759), the Legislature sought to expedite the final operative effect of those decisions. In furtherance of that same proper objective, the Legislature provided in section 25531 that certain Energy Commission decisions also are reviewable directly and exclusively by this court. Application of the latter provision is limited to Energy Commission decisions that are a statutory prerequisite to approval by the PUC of thermoelectric power projects to be constructed by public utilities (Pub. Util. Code, § 1002, subd. (b); fn. 3, ante). Without section 25531, PUC authorization of such a project might be substantially delayed until judicial proceedings to review the Energy Commission’s certification of the project were completed not only in superior court but in the Court of Appeal and this court as well. Thus, the central purpose of section 25531 is to expedite the operative effect of certain certificates of public convenience and necessity issued by the PUC. The question before us is whether enactment of the section was a proper exercise of the Legislature’s broad powers over PUC matters conferred by article XII.
We think it was. “In considering the constitutionality of a legislative act we presume its validity, resolving all doubts in favor of the Act. Unless conflict with a provision of the state or federal Constitution is clear and unquestionable, we must uphold the Act. [Citations].” (California Housing Finance Agency v. Elliott (1976) 17 Cal.3d 575, 594 [131 Cal.Rptr. 361, 551 P.2d 1193]; accord, Eye Dog Foundation v. State Board of Guide Dogs for the Blind (1967) 67 Cal.2d 536, 544 [63 Cal.Rptr. 21, 432 P.2d 717].)
Both the breadth of the Legislature’s powers over PUC matters and the lengths to which this court has gone to infer legislative powers from con*369stitutional provisions are illustrated by Pickens v. Johnson (1954) 42 Cal.2d 399 [267 Cal.Rptr. 801]. The issue in that case was whether legislation for assignment of retired judges to active judicial duties was authorized by a constitutional provision that merely empowered the Legislature to “provide for the payment of retirement salaries to [State] employees” and “to fix and . . . change the requirements and conditions for retirement” (Const., former art. IV, § 22a, adopted in 1930). Upholding the legislation, this court said:
“This type of legislation, both constitutional and statutory, is not new in this state. The Public Utilities Commission has been established under a constitutional enabling act with full power conferred on the Legislature to enact legislation even contrary to any other provisions of the Constitution provided it be cognate and germane to the regulation and control of public utilities. (Const., art. XII, § 22; Pacific Tel. & Tel. Co. v. Eshleman, 166 Cal. 640 [137 P. 1119, Ann. Cas. 1915C 822, 50 L.R.A.N.S. 652].) Likewise the Industrial Accident Commission has been set up under an enabling act whereby the Legislature is expressly vested with plenary power ‘unlimited by any provision of this Constitution, to create, and enforce a complete system of workmen’s compensation. . . .’ (Const., art. XX, § 21; Western Metal Supply Co. v. Pillsbury, 172 Cal. 407 [156 P. 491, Ann.Cas. 1917E 390].)
“Under the foregoing enabling acts the Legislature has enacted laws which, as interpreted by the courts, are controlling, as to the subjects properly legislated upon, over other general provisions of the Constitution and general laws.
“So here the Constitution has in general terms conferred upon the Legislature the power to establish a system for the retirement of judges. The Legislature has done so and has imposed as a condition of retirement that retired judges so long as they receive retirement allowances, shall continue to be judicial officers of the state and with their permission shall be subject to call for judicial service by assignment for that purpose by the chairman of the Judicial Council.
“It would seem to be beyond question that the provision for the assignment and service of a retired judge in accordance with the statute bears a reasonable relationship to a system of judges’ retirement. ...” (Id., at pp. 404-405.)
Especially pertinent here are decisions which hold that statutes confining judicial review of administrative decisions to the appellate courts are within *370legislative powers implied, but not specified, by the Constitution. Loustalot v. Superior Court (1947) 30 Cal.2d 905, 912-913 [186 P.2d 673], held that such a statute was authorized by former article XX, section 21, giving the Legislature “plenary power” to “create, and enforce a complete system of workmen’s compensation” including “an administrative body with all the requisite governmental functions to determine any dispute or matter arising under such legislation, to the end that the administration of such legislation shall accomplish substantial justice in all cases expeditiously, inexpensively, and without incumbrance of any character.” Thaxter v. Finn (1918) 178 Cal. 270, 275 [173 P. 163], found authority for such a statute in an earlier version of article XX, section 21, authorizing the Legislature to “provide for the settlement of any disputes arising under the legislation contemplated by this section, by arbitration, or by an industrial accident board, by the courts, or by either any or all of these agencies, anything in this constitution to the contrary notwithstanding.” Dept, of Alcoholic Bev. Control v. Superior Court (1968) 268 Cal.App.2d 67 [73 Cal.Rptr. 780] upheld a statute confining review of decisions of the Alcoholic Beverage Control Appeals Board to the appellate courts by relying on provisions of article XX, section 22, that board orders “shall be subject to judicial review,” that constitutional provisions and laws inconsistent with the section are repealed, and that the section’s provisions are self-executing, “but nothing herein shall prohibit the Legislature from enacting laws implementing and not inconsistent” with the section. The court concluded that the statute fell within the express authority to enact laws implementing the section, and indicated that in any event the Legislature has implied authority to implement self-executing constitutional provisions through legislation that does not unduly interfere with constitutional rights. (Id., at p. 74.)
In light of the strong presumption of the constitutionality of legislative acts, we conclude that the Legislature’s power to enact the judicial review provisions of section 25531 is implied by the comprehensive authority given the Legislature by article XII over the operations of the PUC. To expedite the operative effect of the PUC’s acts, statutes enacted pursuant to article XII have for over seven decades made PUC decisions reviewable only by this court. The Energy Act was adopted during the national energy crisis of 1974 “to ensure ... a reliable supply of electrical energy” (§ 25001) and “to establish and consolidate the state’s responsibility for energy resources . . . and for regulating electrical generating and related transmission facilities” (§ 25006). Section 25531 was carefully tailored to apply only to Energy Commission action on certifications that are prerequisite to issuance of certificates of public convenience and necessity by the PUC. The-Legislature thereby sought to expedite the state’s ultimate authorization of electric generating plants through not only the Energy Commis*371sion but also the PUC itself.9 Since section 25531 is a means of implementing and facilitating the PUC’s licensing of thermoelectric power facilities sought to be constructed and operated by public utilities, its enactment was authorized by article XII.
Petitioner having agreed to withdraw its request for review of the Energy Commission’s decision if we rule that section 25531 is valid, that decision is affirmed.
Bird, C. J., Broussard, J., Grodin, J., and Kaus, J.,* concurred.
All section references are to the Public Resources Code unless otherwise indicated.
Section 25500 provides: “In accordance with the provisions of this division, the commission shall have the exclusive power to certify all sites and related facilities in the state, whether a new site and related facility or a change or addition to an existing facility. The issuance of a certificate by the commission shall be in lieu of any permit, certificate, or similar document required by any state, local or regional agency, or federal agency to the extent permitted by federal law, for such use of the site and related facilities, and shall supersede any applicable statute, ordinance, or regulation of any state, local, or regional agency, or federal agency to the extent permitted by federal law.
“After the effective date of this division, no construction of any facility or modification of any existing facility shall be commenced without first obtaining certification for any such site and related facility by the commission as prescribed in this division.”
Section 25119 provides: “‘Site’ means any location on which a facility is constructed or is proposed to be constructed.” Section 25110 provides: “ ‘Facility’ means any electric transmission line or thermal powerplant, or both electric transmission line and thermal powerplant, regulated according to the provisions of this division.”
Section 25120, as amended in 1978, provides: “‘Thermal powerplant’ means any stationary or floating electrical generating facility using any source of thermal energy, with a generating capacity of 50 megawatts or more, and any facilities appurtenant thereto. Exploratory, development, and production wells, resource transmission lines, and other related facilities used in connection with a geothermal exploratory project or a geothermal field development project are not appurtenant facilities for the purposes of this division.”
Section 25107 provides: “‘Electric transmission line’ means any electric powerline carrying electric power from a thermal powerplant located within the state to a point of junction with any interconnected transmission system. ‘Electric transmission line’ does not include any replacement on the existing site of existing electric powerlines with electric powerlines equivalent to such existing electric powerlines or the placement of new or additional conductors, insulators, or accessories related to such electric powerlines on supporting structures in existence on the effective date of this division or certified pursuant to this division.”
Public Utilities Code section 1002 now provides in pertinent part: “(a) The commission, as a basis for granting any certificate pursuant to Section 101 shall give consideration to the following factors: [¶] (1) Community values, [¶] (2) Recreational and park areas. [¶] (3) Historical and aesthetic values. [¶] (4) Influence on environment. ... [¶] (b) With respect to any thermal powerplant or electrical transmission line for which a certificate is required pursuant to the provisions of Division 15 (commencing with Section 25000) of the Public Resources Code, no certificate of public convenience and necessity shall be granted pursuant to Section 1001 without such other certificate having been obtained first, and the decision granting such other certificate shall be conclusive as to all matters determined thereby and shall take the place of the requirement for consideration by the commission of the four factors specified in subdivision (a) of this section.”
Section 25531, subdivision (c), provides: “Subject to the right of judicial review of decisions of the commission, no court in this state shall have jurisdiction to hear or determine any case or controversy concerning any manner which was, or could have been, determined in a proceeding before the commission, or to stop or delay the construction or operation of any thermal powerplant except to enforce compliance with the provisions of a decision of the commission.”
Section 25901 provides: “(a) Within 30 days after the commission issues its determination on any matter specified in this division, except as provided in Section 25531, any aggrieved person may file with the superior court a petition for a writ of mandate for review thereof. Failure to file such an action shall not preclude a person from challenging the reasonableness and validity of a decision in any judicial proceedings brought to enforce such decision for other civil remedies, [¶] (b) The evidence before the court shall consist of the record before the commission, and any other relevant facts which, in the judgment of the court, should be considered in determining the validity of any decision of the commission. [¶] (c) Except as otherwise provided herein, the provisions of subdivisions (f) and (g) of Section 1094.5 of the Code of Civil Procedure shall govern proceedings pursuant to this Section.”
Section 25531, subdivisions (a) and (b), provide: “(a) The decisions of the commission on any application of any electric utility for certification of a site and related facility shall be subject to judicial review in the same manner as the decisions of the Public Utilities Commission on the application for a Certificate of Public Convenience and Necessity for the same site and related facility, [¶] (b) No new or additional evidence may be introduced upon review and the cause shall be heard on the record of the commission as certified to by it. The review shall not be extended further than to determine whether the commission has regularly pursued its authority, including a determination of whether the order or decision under review violates any right of the petitioner under the United States Constitution or the California Constitution. The findings and conclusions of the commission on questions of fact shall be final and shall not be subject to review, except as provided in this article. Such questions of fact shall include ultimate facts and the findings and conclusions of the commission. A report prepared by, or an approval of, the commission pursuant to Section 25510, 25514, 25516, or 25516.5, or subdivision (b) of Section 25520.5, shall not constitute a decision of the commission subject to judicial review.”
Section 25903 provides: “If any provision of subdivision (a) of Section 25531, with respect to judicial review of the decision on certification of a site and related facility, is held invalid, judicial review of such decisions shall be conducted in the superior court subject to the conditions of subdivision (b) of Section 25531. The superior court shall grant priority in setting such matters for review, and the appeals from any such review shall be given preference in hearings in the Supreme Court and courts of appeal.”
The initial two paragraphs of article VI, section 10, provide: “The Supreme Court, courts of appeal, superior courts, and their judges have original jurisdiction in habeas corpus proceedings. Those courts also have original jurisdiction in proceedings for extraordinary relief in the nature of mandamus, certiorari, and prohibition. [¶] Superior courts have original jurisdiction in all causes except those given by statute to other trial courts.”
The Legislature’s purpose to expedite is further demonstrated by section 25903 (fn. 7, ante), providing that if the direct review provisions of section 25531 were to be held invalid, the superior court should give section 25531 matters priority and hear them only on the record of the commission, and appeals should be given preference by the appellate courts.
Retired Associate Justice of the Supreme Court sitting under assignment by the Chairperson of the Judicial Council.