ARTICLE 4. Minor Boundary Changes [23200. - 23221.]

Cal. Government Code - GOV 4.

in effect

Cal. Government Code - GOV § 23200. Section 23200.

The Legislature finds and declares that the existing boundaries of some counties no longer meet the needs of their residents and landowners. The Legislature further finds and declares that the statutory procedures for altering county boundaries which existed before the enactment of this article were cumbersome and discouraged county boards of supervisors from adjusting their mutual boundaries. In enacting this article, it is the intent of the Legislature to permit county boards of supervisors to approve changes to the boundaries of their counties. This article shall be deemed a uniform procedure for county boundary change as required by Section 1 of Article XI of the California Constitution.

Cal. Government Code - GOV § 23201. Section 23201.

As used in this article: (a) “Affected county” means any county which contains or would contain territory which is the subject of a boundary change. (b) “Affected territory” means any unincorporated area which is proposed to be transferred from one county to another. (c) “Conducting county” means any county whose board of supervisors adopts a resolution pursuant to Section 23206. (d) “Inhabited territory” means territory within which there reside 12 or more registered voters at the time a resolution is adopted pursuant to Section 23203 or a petition is filed pursuant to Section 23205. (e) “Initiating county” means any county whose board of supervisors adopts a resolution pursuant to Section 23203.

Cal. Government Code - GOV § 23202. Section 23202.

A boundary line between counties shall not be changed, pursuant to this article, if the change would result in any of the following: (a) The line to be moved a distance of more than 5 miles from its original location. (b) A reduction by more than 5 percent in the area of any affected county. (c) A reduction by more than 5 percent of the population of any affected county, as determined by the State Department of Finance’s most recent estimate of population.

Cal. Government Code - GOV § 23203. Section 23203.

The board of supervisors of any affected county may propose to change the boundary line between that county and another county by adopting a resolution which shall: (a) State that the proposal is made pursuant to this article and request that proceedings be taken. (b) State the reasons for the proposal. (c) Set forth a description of the proposed new boundary line. (d) State whether or not the proposed new boundary line will be more than 5 miles from its original location. (e) State whether or not the proposed new boundary line will reduce the area of any affected county by more than 5 percent. (f) State whether or not the proposed new boundary line will reduce the population of any affected county by more than 5 percent. (g) State whether or not the proposal affects inhabited territory. (h) Set forth any proposed terms and conditions to which the proposed boundary change shall be subject, including, but not limited to, the division of any county indebtedness or property.

Cal. Government Code - GOV § 23204. Section 23204.

The board of supervisors of the initiating county shall file its resolution with the board of supervisors of the other affected county.

Cal. Government Code - GOV § 23205. Section 23205.

(a) A proposal to change the boundary line of two counties may be initiated by petition which shall contain all the matters required to be contained in a resolution adopted pursuant to Section 23203. The petition shall also designate a chief petitioner. (b) A petition shall be signed by not less than 25 percent of the resident-voters within the affected territory or by not less than 25 percent of the property owners within the affected territory who also own not less than 25 percent of the assessed value of land and improvements within the affected territory. (c) A petition may consist of a single instrument or separate counterparts. Each signer of a petition shall add the date of signing to his or her signature. A signature by a resident-voter shall be accompanied by the address of the voter. A signature by a property owner shall be accompanied by a description sufficient to identify the property owned. (d) A petition shall be filed with the board of supervisors of any affected county. No petition shall be accepted for filing unless the signatures have been secured within 90 days of the date on which the first signature was affixed. (e) Within 30 days of the receipt of a petition, the clerk of the board of supervisors shall determine whether the petition is signed by the required number of signatures. If the petition does not contain the required number of signatures, the clerk of the board of supervisors shall return the petition to the chief petitioner. If the petition contains the required number of signatures, the board of supervisors shall conduct proceedings pursuant to this article.

Cal. Government Code - GOV § 23206. Section 23206.

Within 30 days of receiving a resolution adopted pursuant to Section 23203 or of determining that a petition filed pursuant to Section 23205 has been signed by the required number of signatures, the board of supervisors shall adopt a resolution which shall: (a) Set a time, date, and place of hearing on the proposal which shall be not less than 30 days nor more than 60 days from the date of adoption of the resolution setting the hearing. (b) State that any person may appear and be heard at the hearing. Any person desiring to protest against the proposal may file a written protest with the board of supervisors. Any written protest by a resident-voter shall contain the address of the voter. Any written protest by a property owner shall contain a description sufficient to identify the property owned.

Cal. Government Code - GOV § 23207. Section 23207.

The board of supervisors of the conducting county shall give notice of the hearing by each of the following: (a) Notice shall be published pursuant to Section 6061 in one or more newspapers of general circulation within the affected territory and within each affected county. Publication shall commence at least 15 days before the date set for the hearing. (b) Notice shall be mailed to the board of supervisors of the other affected county, to each special district and school district which includes the affected territory within its boundaries, to the local agency formation commission of each affected county, and to each person who has filed a written request for special notice.

Cal. Government Code - GOV § 23208. Section 23208.

The hearing on the proposed boundary change shall be held by the board of supervisors of the conducting county on the date and at the time specified in the resolution adopted pursuant to Section 23206. The board of supervisors of the conducting county may hold the hearing jointly with the board of supervisors of the other affected county. At the hearing, the board of supervisors shall hear testimony from interested persons and receive any oral or written protests. Any person who filed a written protest may withdraw it at any time before the conclusion of the hearing. The hearing may be continued from time to time, not to exceed 45 days from the date specified in the resolution.

Cal. Government Code - GOV § 23209. Section 23209.

At the conclusion of the hearing, the board of supervisors of the conducting county shall adopt a resolution abandoning the proposed boundary change if: (a) In the case of inhabited territory, more than 50 percent of the resident-voters in the affected territory have filed and not withdrawn written protests before the conclusion of the hearing. (b) In the case of uninhabited territory, more than 50 percent of the property owners who own more than 50 percent of the value of the land and improvements in the affected territory have filed and not withdrawn written protests before the conclusion of the hearing. (c) In the case of either inhabited or uninhabited territory, the board of supervisors of either affected county has filed and not withdrawn a written protest before the conclusion of the hearing.

Cal. Government Code - GOV § 23210. Section 23210.

(a) Not later than 30 days after the conclusion of the hearing, if a proposed boundary change has not been abandoned pursuant to Section 23209, the board of supervisors of each affected county shall adopt substantially similar ordinances approving the proposed boundary change. (b) The ordinances shall declare that the proposal meets each of the conditions of Section 23202. The ordinances shall specify any terms and conditions to which the boundary change is subject, including, but not limited to, a division of any county debt or property. In addition, the ordinances shall state the effective date of the boundary change. The ordinances shall be adopted by majority vote of each board of supervisors. (c) If, in the case of inhabited territory, more than 25 percent, but not more than 50 percent, of the resident-voters in the affected territory have filed and have not withdrawn written protests before the conclusion of the hearing, the board of supervisors of each affected county shall provide that their ordinances are subject to confirmation by the voters in the affected territory. The election shall be conducted in accordance with the procedures of the Elections Code relating to county referendum elections regarding the qualifications of voters, the manner of voting, the form of the ballot, the duties of precinct and election officers, the canvassing of returns, and all other particulars. (d) After the canvass of the returns of any election on the proposed boundary change conducted pursuant to subdivision (c), the board of supervisors of the conducting county shall declare by resolution the total number of votes cast in the election and the number of votes cast for and against the proposed boundary change. If a majority of the votes were cast against the proposed boundary change, then the ordinances adopted pursuant to subdivision (a) shall not take effect. If a majority of the votes were cast in favor of the proposed boundary change, then the ordinances shall take effect, as provided.

Cal. Government Code - GOV § 23211. Section 23211.

Each county shall continue to provide services to the territory within its own boundaries until the effective date of the boundary change as specified in the ordinances adopted pursuant to Section 23210.

Cal. Government Code - GOV § 23212. Section 23212.

When a county boundary is changed pursuant to this article, the boards of supervisors of the affected counties shall file before the following December 1, with the State Board of Equalization and with the assessors of the affected counties, a statement setting forth the legal description of the boundary, as changed, together with a map or plat indicating the boundary. The change of the boundary shall not be effective for purposes of assessment or taxation unless the statement, together with the map or plat is filed with the assessors and the State Board of Equalization on or before December 1 of the year immediately preceding the year in which the assessments or taxes are to be levied.

Cal. Government Code - GOV § 23213. Section 23213.

All taxes levied before the effective date of the boundary change shall be collected by the officers of and belong to the county in which the affected territory was situated before the boundary change, unless the ordinances adopted pursuant to Section 23210 provide otherwise.

Cal. Government Code - GOV § 23214. Section 23214.

After the effective date of the boundary change, the officers of the affected counties shall complete all proceedings necessary for the assessment or collection of state and local taxes for the current year with respect to the affected territory. Subject to Section 23213, all actions taken by the officers of the affected county before the effective date of the boundary change shall be deemed performed by the officers of the county in which the affected territory is situated after the effective date of the boundary change, for the benefit of that county.

Cal. Government Code - GOV § 23215. Section 23215.

The officers of an affected county shall immediately execute and deliver to the board of supervisors of the other affected county copies of all assessments or other proceedings relative to the assessment and collection of the current state and local taxes in the affected territory. The copies shall be filed with the respective officers of the affected counties who would have their custody if the proceedings had been originally had in that county and shall be deemed originals. All proceedings recited in the copies shall be deemed original proceedings in the other affected county and shall have the same effect as if the proceedings had been had at the proper time and in the proper manner by the respective officials of that county.

Cal. Government Code - GOV § 23216. Section 23216.

The county superintendent of schools of an affected county shall furnish the superintendent of the other affected county with a certified copy of the last school census of the school districts in the affected territory. A county superintendent of schools shall transfer to the superintendent of the other affected county any money that is or may be due to the school districts in the affected territory.

Cal. Government Code - GOV § 23217. Section 23217.

The auditor of an affected county shall transfer to the auditor of the other affected county any money that is or may be due to the other affected county from road districts in the affected territory. The money shall be properly credited in each county.

Cal. Government Code - GOV § 23218. Section 23218.

No school district and no special district, including a special district which is governed by a board of supervisors or whose governing body is the same as the board of supervisors, shall have its territory divided or have its organization changed in any other way as the result of a county boundary change except by proceedings taken pursuant to law subsequent to the boundary change.

Cal. Government Code - GOV § 23219. Section 23219.

If the affected counties are located in different district court of appeals districts, the district court of appeals district which includes the affected territory shall retain jurisdiction in all cases pending in a session of that court.

Cal. Government Code - GOV § 23220. Section 23220.

On and after the effective date of the boundary change, the superior court in each affected county shall retain jurisdiction in all cases pending in a session of that court.

Cal. Government Code - GOV § 23221. Section 23221.

Any action to determine the validity of any minor change to the boundaries of a county pursuant to this article shall be brought pursuant to Chapter 9 (commencing with Section 860) of Title 10 of Part 2 of the Code of Civil Procedure.

Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026