California Public Utilities Code
Any city not included within the boundaries of the district may be annexed thereto in the manner provided in this chapter, and if such annexation is successful, shall be entitled to seat one member on the district's board of directors.
The legislative body of the city proposed to be annexed shall agree in writing with the board upon the terms and conditions of annexation, which agreement, among other things, may provide for the levy and collection of special taxes within the city in addition to the taxes elsewhere in this act provided for, the fixing of rates, rentals, and charges differing from those fixed or existing elsewhere within the district, the incurring or assumption of indebtedness, or the making of a payment or payments, or the transfer of property, real and personal, and other assets to the district by the city.
As an alternative to commencement of annexation proceedings by action of the legislative body of a city, a petition signed by voters within the city proposed to be annexed, equal in number to at least 10 percent of the total vote cast at the last general election, and asking that proceedings be taken for its annexation, may be addressed to the board and filed with the secretary of the district.
The petition may include one or more separate documents, but each document shall contain the affidavit of the party who circulated it, certifying that each name signed thereto is the true signature of the person whose name it purports to be. The secretary of the district shall compare the signatures on the petition with the affidavits of registration on file with the county elections official and if he or she finds that the petition has been signed by the required number of voters he or she shall attach his or her signature thereto and present the petition to the board.
If the board determines that the annexation of the city, whose voters have petitioned pursuant to Section 90773, would facilitate the acquisition or operation of any transit facilities for the district or be of advantage to the district, then the board shall also determine the terms and conditions upon which the annexation should be made. The terms and conditions of annexation shall be embodied in an annexation agreement. The annexation agreement may provide, among other things, for any or all of the items set forth in Section 90771.