This case, involving an attack upon the validity of an annexation by the city of Liberty, resulted in a judgment for the city, et al. (defendants) and an appeal to the court of appeals, Kansas City district. That court reversed and remanded in an opinion by Welborn, sitting as a special judge, after which we ordered the case transferred to this court. We determine after review that the opinion of Welborn, S. J., should be, and it is, adopted with minor additions as the decision of this court.
The city of Liberty is a Special Charter city, having a population by the 1970 census of less than 20,000 inhabitants. Its power of annexation is fixed by § 81.080, RSMo 1969, which provides, in part:
“Any city or town of less than twenty thousand inhabitants and having a special charter, after the taking effect of such charter, may at any time extend its limits by ordinance, specifying with accuracy the new lines to which it is proposed to extend such limits. All courts of this state shall take judicial notice of the limits of such city when thus extended.”
On April 6,1962, the Liberty City Council passed a resolution by which it declared its intention to annex approximately 25 square miles of unincorporated territory, described in the resolution. The date of the proposed annexation was set as January 1, 1967.
In compliance with the “Sawyers Act” (§ 71.015, RSMo 1969), approximately one year later, on May 31,1963, the city filed an action (case No. 29890) for a declaratory judgment. The petition described the area to be annexed as that covered by the resolution and stated that the city “proposes that such annexation would become effective on January 1, 1967.” Six landowners in the area proposed to be annexed were named defendants and class representatives. No response to the city’s petition was filed.
On September 9, 1963, the matter was heard in the Clay County Circuit Court, Division No. 2. On that date, the circuit court entered judgment, by which it found that the defendants were fairly chosen; that they adequately and fairly represented the whole class of landowners in the area to be annexed; and, that all of the landowners in the area described will be bound by the judgment. The judgment further recited:
“The Court further finds that the annexation prayed in the plaintiff’s petition is reasonable and necessary to the proper development of the plaintiff’s city and further finds that the plaintiff will have the ability to furnish the normal municipal services to the area herein sought to be annexed within a reasonable time after said annexation has become effective on January 1, 1967.”
The court adjudged “that the plaintiff be and is hereby authorized to annex to the City of Liberty the * * * property [described in the petition].”
Having obtained the above judgment as required by the Sawyers Act, the Liberty City Council enacted on the same day (September 9,1963) Ordinance No. 2278, extending the city limits to include the area set out in the judgment, and prescribing an effective date for the annexation of January 1, 1967.
On December 22, 1965, the city council amended Ordinance No. 2278 by removing a part of the area described in Ordinance No. 2278. The ordinance recited no reason for the change. The size of the deleted area
On December 22, 1966, the council again amended Ordinance No. 2278, this time to postpone the effective date of the annexation to January 1, 1968. The ordinance, as thus amended, recited that there was a pending lawsuit challenging another annexation and that if that annexation were held invalid, the territory covered by Ordinance No. 2278 would not be contiguous to the city limits.
Five subsequent amendatory ordinances, enacted from December 18,1967, to December 13, 1971, each postponed the effective date of the annexation by one year, until January 1, 1973, became the effective date. No reason for the amendments appears in any of these ordinances.
On October 30, 1972, Ordinance No. 2278, as amended, was again amended. By this amendment, the last, the limits of the area to be annexed were changed so that the size of the area to be annexed in fact on the effective date was reduced to less than one-half of that originally proposed. The area described in this amendatory ordinance was all within the area originally proposed to be annexed. The ordinance called for the extension of the city limits to become effective January 1, 1973.
On December 21, 1972, Donald R. Young, et al. (plaintiffs), three residents of the area described in the last ordinance, brought the instant suit in three counts: (1) to enjoin enforcement of Ordinance No. 2278, as amended; (2) for a declaratory judgment to the effect that the ordinances purporting to annex the area to the city of Liberty are void; and (3) in quo warranto on the information of the Clay County Prosecuting Attorney at the relation of a resident of the areá sought to be annexed, praying for a judgment that the ordinances purporting to annex the tract in question were void.
The grounds for relief were the same in all three counts. Several of the grounds have been abandoned and basically the sole ground now relied upon is paragraph 11(e) of Count I of the petition:
“The defendant has failed and refused to comply with the intent and purpose of Section 71.015, et seq., RSMo., 1969, as amended, by attempting to delay the effective date of said annexation beyond the time set forth in the original Ordinance No. 2278 and as declared by this Court in cause No. 29890, in that the defendant has illegally attempted to circumvent the requirement of law that a court of general jurisdiction declare the reasonableness and necessity of the proposed annexation of the specific area sought to be annexed at a time contemporaneous with the date thereof; * * *.”
The defendants’ answer in general alleged that the city had complied with the Sawyers Act in the 1963 action and that subsequent postponement of the effective date of annexation and reductions in the area to be annexed were matters for determination by the city council in the exercise of legislative right and prerogative. The defendants also asserted that the 1963 declaratory judgment was res judicata, giving the city a continuing authority to proceed with the annexation at such times and in such manner as might be determined solely by it.
No temporary injunctive relief was granted and the annexation became effective January 1, 1973.
The cause was heard in circuit court on July 5,1973. The plaintiffs presented documentary evidence consisting of the ordinances involved, the petition and judgment in the 1963 action and a land use sketch plan, dated October, 1970, prepared by the Metropolitan Planning Commission, Kansas City Region, which described the boundary of the area authorized to be annexed as a “holding order” boundary. Plaintiffs also offered oral testimony of one of the plaintiffs and what they claimed were admissions from depositions of the Mayor and City Administrator of Liberty.
The trial court found for defendants. Its conclusions of law are as follows:
Page 736“1. The declaratory judgment entered on September 6, 1963, by the Circuit Court of Clay County, in Case No. 29890 authorized the City to proceed with the annexation of the area of land described therein as otherwise authorized by its charter and became a final, binding and conclusive judgment, no appeal being taken therefrom.
“2. The date of January 1, 1967, in the declaratory judgment entered on September 6, 1963, in Case No. 2SGCC was the earliest date on which said annexation could become effective. It did not prevent the City from postponing the date.
“3. After the declaratory judgment was entered in Case No. 29890, the time when the limits of the annexation to be made by the City, so long as the land annexed lay within the boundary of the tract set out in the judgment, was solely and exclusively a discretionary legislative prerogative for the determination by the City Council of the City of Liberty. This judgment merely established that the annexing of the described tract was reasonable and necessary to the proper development of the City, and that the City could provide municipal services; its effect was merely to authorize the City to proceed. The City was not bound or required to proceed to annex all of the described tract and could postpone action to such later date as it might see fit, or annex only a portion of the tract, in its sole discretion, subject only to a change of conditions and circumstances.
“4. All actions taken by the City Council subsequent to September 6,1963, in amending the original ordinance of that date, No. 2278, either with respect to reducing the territory to be included or extending the effective date, were legal and valid ordinances enacted pursuant to the power vested in the City Council of the City of Liberty.
“5. The judgment in Case No. 29890 finding that annexation of the area described therein by the City of Liberty was reasonable and necessary is res ad judicata, binding and conclusive unless and until such a substantial change of conditions and circumstances is shown as to make the annexation unreasonable and unnecessary, rather than reasonable and necessary as found.
“6. That the burden of proving such a substantial change of conditions and circumstances was upon the plaintiffs in this case. The plaintiffs have failed to establish that there was such a substantial change of conditions and circumstances as to make the annexation under the authority of the judgment in Case No. 29890 unreasonable and unnecessary so that such judgment remains binding and conclusive and is res adjudicata of this action.
“7. A valid annexation of the area in question was accomplished by the City on January 1, 1973, pursuant to the provisions of Ordinance No. 3229, so that this area is, and continuously has been since that date, a part of the City of Liberty.”
After their post-judgment motion had been overruled, plaintiffs appealed.
On this appeal, the basic position of plaintiffs is that once a judgment has been rendered under the Sawyers Act, giving judicial authorization of a proposed annexation, a substantial change in the annexation proposal requires the city to obtain a further adjudication under the Sawyers Act with respect to the altered proposal.
Section 71.015, the Sawyers Act, provides:
“Whenever the governing body of any city has adopted a resolution to annex any unincorporated area of land, such city shall, before proceeding as otherwise authorized by law or charter for annexation of unincorporated areas, file an action in the circuit court of the county in which such unincorporated area is situated, under the provisions of chapter 527 RSMo, praying for a declaratory judgment authorizing such annexation. The petition in such action shall state facts showing:
“1. The area to be annexed;
Page 737“2. That such annexation is reasonable and necessary to the proper development of said city; and
“3. The ability of said city to furnish normal municipal services of said city to said unincorporated area within a reasonable time after said annexation is to become effective. Such action shall be a class action against the inhabitants of such unincorporated area under the provisions of section 507.070, RSMo.”
The purpose and effect of this statute has been stated in the numerous cases which have arisen since its passage. It does require a favorable judgment as a condition precedent to a municipal annexation. The essential consideration for the court is the reasonableness of the proposed action, the same judicial question which was involved in annexation cases prior to the Sawyers Act, except that in those cases, the question arose subsequent to the annexation, not before. In such prior cases, the proponents of “unreasonableness” had the burden of proof on that issue. See Seifert v. City of Poplar Bluff, 112 S.W.2d 93, 96[2] (Mo.App.1938). The Sawyers Act changed that burden by requiring the municipality to bring an action before annexation and demonstrate the “reasonableness” of its proposed action. City of St Joseph v. Hankinson, 312 S.W.2d 4 (Mo.1958); City of Olivette v. Graeler, 338 S.W.2d 827, 833[2,3] (Mo.1960); City of Bourbon v. Miller, 420 S.W.2d 296, 300[1—4] (Mo. banc 1967); City of Odessa v. Carroll, 512 S.W.2d 862, 866[1,2] (Mo.App.1974). Annexation by a municipality remains a legislative prerogative. The Sawyers Act affects merely the procedure by which the limited authority of the judiciary in the process is invoked. City of St. Joseph v. Hankinson, supra.
“A municipal corporation or its corporate authorities have no power to extend its boundaries otherwise than as provided for by legislative enactment or constitutional provision. Such power may be validly delegated to municipal corporations by the legislature, and when so conferred must be exercised in strict accord with the statute conferring it.” 56 Am.Jur.2d, Municipal Corporations, § 63, p. 117 (1971). As stated, the Sawyers Act imposes upon cities the obligation to procure, before completion of the annexation process, a declaratory judgment authorizing the annexation of the area the city intends to annex. Julian v. Mayor, Councilmen and Citizens of the City of Liberty, 391 S.W.2d 864 (Mo.1965). No valid annexation may be accomplished by a city such as Liberty without compliance with the Act. Anderson v. Moline Acres, 386 S.W.2d 38 (Mo.1964).
The issue here is what is the effect of the Sawyers Act when a city obtains judicial authorization for the annexation of certain territory and thereafter proceeds to annex in fact another tract which is less than half the size, but is a part of the original territory. Plaintiffs assert that such a change without again proceeding under § 71.015 results in the annexation of territory without that judicial scrutiny required by the Sawyers Act and, if permitted to stand, nullifies the protection the Act was designed to extend against arbitrary municipal extension of boundaries.
One of the matters required by the Sawyers Act to be stated in the city’s petition is “The area to be annexed.” This requirement is designed to permit citizens to identify the area proposed to be annexed. See City of Cape Girardeau v. Armstrong, 417 S.W.2d 661, 674[2] (Mo.App.1967). Compliance with this requirement delineates the area on which is based the court’s inquiry and determination as to whether the requirements of reasonableness and ability to provide municipal services are demonstrated. The court cannot decide “reasonableness” and the city’s “ability” except with reference to the territory submitted to it in the city’s petition. City of Bourbon v. Miller, supra (420 S.W.2d at 301[5, 6]); City of Aurora v. Empire District Electric Company, 354 S.W.2d 45, 55-56[7, 8] (Mo.App.1962). Thus, in this case the circuit court, on the petition before it, could not have entered a judgment requiring or authorizing the city to annex only
Respondents contend and the trial court agreed that such a judgment did not restrict the legislative right of the city to determine the scope of its annexation plan so long as the area fell within the described area. However, the Sawyers Act itself is a limitation upon the municipal legislative prerogative. To hold that once a judgment approving an annexation has been obtained the plan is not subject to municipal legislative alteration without further judicial authorization does not amount to conferring legislative power on the court. The action of the court in approving or disapproving an altered proposal would be no less judicial than its approval of the original proposal. There is nothing which prevents the general assembly in conferring power of annexation to require that the municipality proceed with the plan as judicially authorized or obtain further judicial authorization if a different plan is thereafter proposed for ultimate adoption. State ex rel. and to Use of Behrens v. Crismon, et al., 354 Mo. 174, 188 S.W.2d 937, 939[2, 3] (banc 1945).
The question presented by this case is essentially one of construction of the Sawyers Act. In view of the effect of the burden which that legislation shifted to the city of establishing in advance the reasonableness of its annexation proposal and in view of the requirement that the petition for approval describe the area proposed to be annexed, it is reasonable to conclude that the legislature intended to require the city to comply with the Act with respect to the area ultimately annexed and to require judicial authorization for that particular action. See Anderson v. Moline Acres, supra.
The defendants’ argument, based primarily on the doctrine of res judicata, is not persuasive because there is no judgment authorizing the action which the city actually took.
Defendants rely heavily upon the case of Hixson v. Kansas City, 361 Mo. 1211, 239 S.W.2d 341 (banc 1951), a decision antedating the Sawyers Act, in support of their res judicata argument. That case involved an attempt by residents of Clay County to compel an election on their petition to amend the Kansas City Charter so as to change the boundaries by excluding that part of the city located in Clay County. The annexation which had added that territory to Kansas City had then only recently received approval of the Supreme Court in State ex inf. Taylor ex rel. Kansas City v. North Kansas City, 360 Mo. 374, 228 S.W.2d 762 (banc 1950), a decision which also antedated and did not involve the Sawyers Act. The annexation had become effective January 1,1950, the decision in Taylor approving it had become final on April 10, 1950, and the Hixson petition for de-annexation was filed June 21, 1950. In declining to order the de-annexation election, the court stated that “action purporting to de-annex the Clay County area would be unreasonable”; that the “reasonableness” of the annexation had just been decided in Taylor, and that decision was res judicata of the issue. The requirement which Hixson imposed upon those persons seeking de-annexation is not applicable to this case.
In Hixson, supra, the city could point to a recent judgment which encompassed the precise area involved in both cases (Hixson and Taylor), and the principles of res judi-cata were applicable. Not so here, there is no judgment to which the city can point authorizing the particular annexation which the city purported to accomplish. Here, the action taken by the city was to annex in fact, not the land area it had, in its Sawyers Act suit, represented to the court to be reasonable and necessary to the proper development of the city, not the land area the court by its declaratory judgment authorized the city to annex, but, rather, a different tract of land. True, the area in fact annexed was a part, a small part, of the land
The plaintiffs are not here asserting the unreasonableness of the annexation, but are attacking it on the sole ground that the city has not procured that judicial authorization required by the Sawyers Act.
We conclude that the annexation attempted to be effected January 1, 1973, by the city’s ordinance No. 3229, was without the authority required by § 71.015, is therefore void, and the judgment should be reversed.
The judgment is reversed and the cause is remanded with directions that judgment be entered for plaintiffs.