Cal. Gov't Code § 65302.7

(a) For the purposes of complying with Section 65302.5, each county or city located within the boundaries of the Sacramento and San Joaquin Drainage District, as set forth in Section 8501 of the Water Code, shall submit the draft element of, or draft amendment to, the safety element to the Central Valley Flood Protection Board and to every local agency that provides flood protection to territory in the city or county at least 90 days prior to the adoption of, or amendment to, the safety element of its general plan.
(b) The Central Valley Flood Protection Board and each local agency described in paragraph (1) shall review the draft or an existing safety element and report their respective written recommendations to the planning agency within 60 days of the receipt of the draft or existing safety element. The Central Valley Flood Protection Board and each local agency shall review the draft or existing safety element and may offer written recommendations for changes to the draft or existing safety element regarding both of the following:
1. (1) Uses of land and policies in areas subjected to flooding that will protect life, property, and natural resources from unreasonable risks associated with flooding.
2. (2) Methods and strategies for flood risk reduction and protection within areas subjected to flooding.
(c) Prior to the adoption of its draft element or draft amendments to the safety element, the board of supervisors of the county or the city council of a city shall consider the recommendations made by the Central Valley Flood Protection Board and any local agency that provides flood protection to territory in the city or county. If the board of supervisors or the city council determines not to accept all or some of the recommendations, if any, made by the Central Valley Flood Protection Board or the local agency, the board of supervisors or the city council shall make findings that state its reasons for not accepting a recommendation and shall communicate those findings in writing to the Central Valley Flood Protection Board or to the local agency.
(d) If the Central Valley Flood Protection Board’s or the local agency’s recommendations are not available within the time limits required by this section, the board of supervisors or the city council may act without those recommendations. The board of supervisors or city council shall consider the recommendations at the next time it considers amendments to its safety element.