California Code, Public Resources Code - PRC § 35121

(a) If, after the establishment of the authority's boundaries pursuant to Section 35120, territory within the authority is annexed to a city which is outside the authority, that territory may be detached from the authority pursuant to the Cortese-Knox-Hertzberg Local Government Reorganization Act of 2000 (Division 3 (commencing with Section 56000) of Title 5 of the Government Code).

(b) If, after the establishment of the authority's boundaries pursuant to Section 35120, a city which is outside the authority's jurisdiction desires to be included within the authority's jurisdiction, the city shall adopt a resolution as provided in Section 35120.  Following the adoption of the resolution, the territory within the city may be annexed to the authority pursuant to the Cortese-Knox-Hertzberg Local Government Reorganization Act of 2000 (Division 3 (commencing with Section 56000) of Title 5 of the Government Code). If the authority levies a special tax or an assessment and proposes to extend that special tax or assessment to the territory proposed to be annexed, the annexation shall not be complete until the authority complies with the procedures for levying the special tax or the assessment in that territory, including notice, hearing, and an election, in that territory, when required.