Cal. Health and Safety Code - HSC § 40980. Section 40980.
(a)
The Sacramento district shall, at a minimum, be governed by a district board composed of the Board of Supervisors of the County of Sacramento.
(b)
If the County of Placer submits a resolution of inclusion, pursuant to Section 40963, one or more elected officials from that county shall be included on the Sacramento district board, pursuant to agreement between that county and the Sacramento district board.
(c)
(1)
The membership of the Sacramento district board shall include one or more members who are mayors or city council members, or both, and one or more members who are county supervisors.
(2)
The number of those members and their composition shall be determined jointly by the counties and cities within the district, and shall be approved by a majority of the counties, and by a majority of the cities that contain a majority of the population in the incorporated area of the district.
(d)
The governing board shall reflect, to the extent feasible and practicable, the geographic diversity of the district and the variation of population between the cities in the district.
(e)
(1)
Except as provided in paragraph (2), the members of the governing board who are mayors or city council members shall be selected by the city council of the city that they represent. The members of the governing board who are county supervisors shall be selected by the county if the district only contains one county or a majority of counties within the district if the district contains more than one county.
(2)
The city selection committee shall be convened to select a member of the governing board from nominees who are mayors or city council members only if there is to be a change in a board member designated to represent more than one city, and only if more than one of those cities submits nominees for that board member position.
(3)
When selecting a member of the governing board, a city council and the city selection committee may also appoint a mayor or another city council member as an alternate to serve and vote in place of the member who is absent or is disqualified from participating.
(f)
(1)
If the district fails to comply with subdivision (c), one-third of the members of the governing board shall be mayors or city council members, and two-thirds shall be county supervisors. The number of those members shall be determined as provided in paragraph (2) of subdivision (c), and the members shall be selected pursuant to subdivision (e).
(2)
For purposes of paragraph (1), if any number which is not a whole number results from the application of the term “one-third” or “two-thirds,” the number of county supervisors shall be increased to the nearest integer, and the number of mayors or city council members decreased to the nearest integer.