California Code, Government Code - GOV § 34877.5

(a) After an ordinance is passed by the voters pursuant to Section 34876.5, or after an ordinance is enacted by the legislative body pursuant to Section 34886, the legislative body shall prepare a proposed map that describes the boundaries and numbers of the districts for the legislative body.  In preparing the proposed map, the legislative body shall comply with the requirements and criteria of Section 21130 of the Elections Codeand shall seek public input, including accepting proposed maps submitted by the public.

(b) If the legislative body is changing from an at-large method of election to a district-based election, as those terms are defined in Section 14026 of the Elections Code, the legislative body shall hold public hearings pursuant to Section 10010 of the Elections Code.  If the legislative body is otherwise adjusting the district boundaries, the legislative body shall hold public hearings on the proposed district boundaries pursuant to Section 21150 of the Elections Code.