40100.

 Except as provided in Section 40100.5, Sections 40100.5 and 40100.6, a county board of supervisors shall be ex officio the county district board of the county.

40100.5.

 (a) The membership of the governing board of each county district shall include (1) one or more members who are mayors, city council members, or both, and (2) one or more members who are county supervisors.

(b) The number of those members and their composition shall be determined jointly by the county and the cities within the district, and shall be approved by the county, county and by a majority of the cities that contain a majority of the population in the incorporated area of the district.

(c) 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.

(d) (1) The members of the governing board who are mayors or city council members shall be selected by the city selection committee. When selecting a member of the governing board, the city selection committee may also select a mayor or another city council member as an alternate to serve and vote in place of the member who is absent or disqualified from participating.

(2) In districts where the county and the cities have agreed that each city shall be represented on the governing board, each city shall select its own representative to the governing board. When selecting a member of the governing board, each city may also select its 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.

(3) The members of the governing board who are county supervisors shall be selected by the county.

(e) (1) This section does not apply to any district in which the population of the incorporated area of the county is 35 percent or less of the total county population, as determined by the district on June 30, 1994, or to a county district having a population of more than 2,500,000 as of June 30, 1990. 1994.

(f) If a district fails to comply with subdivisions (a) and (b), the membership of the governing board shall be determined as follows:

(1) In districts in which the population in the incorporated areas represents between 36 and 50 percent of the total county population, one-third of the members of the governing board shall be mayors or city council members, and two-thirds shall be county supervisors.

(2) In districts in which the population in the incorporated areas represents more than 50 percent of the total county population, one-half of the members of the governing board shall be mayors or city council members, and one-half shall be county supervisors.

(3) The number of those members shall be determined as provided in subdivision (b), and the members shall be selected pursuant to subdivision (d).

(4) For purposes of paragraphs (1) and (2), if any number that is not a whole number results from the application of the term “one-third,” “one-half,” 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.

40100.6.

 (a) The members of the San Diego County Air Pollution Control District board shall be appointed as follows:

(1) Two members representing the board of supervisors as appointed by a majority of the board of supervisors.

(2) Three members representing the City of San Diego appointed by a majority of the city council members. The members shall be city council members or the mayor.

(3) One member representing the City of Chula Vista or the City of Oceanside. The member shall either be a city council member or the mayor and shall be appointed by a majority of their city council. The member shall serve one term, with the position rotating to the other city for the next term.

(4) One member representing the City of Escondido, the City of Carlsbad, the City of El Cajon, or the City of Vista. The member shall be a city council member or the mayor and shall be appointed by a majority of their city council. The member shall serve one term, with the position rotating to the next city listed in order in this paragraph for the next term.

(5) One member representing the City of San Marcos, the City of Encinitas, the City of National City, the City of La Mesa, the City of Santee, the City of Poway, the City of Imperial Beach, the City of Lemon Grove, the City of Coronado, the City of Solana Beach, or the City of Del Mar. The member shall be a city council member or the mayor and shall be appointed by a majority of their city council. The member shall serve one term, with the position rotating to the next city listed in order in this paragraph for the next term.

(6) Three public members shall be appointed by the members appointed pursuant to paragraphs (1) to (5), inclusive, at a public hearing. The public members shall be appointed according to the following:

(A) One public member shall be a physician or public health professional actively practicing within the boundaries of the San Diego County Air Pollution Control District. The member’s speciality shall be in the health effects of air pollution on vulnerable populations.

(B) One public member shall be a person representing environmental justice interests and who works directly with communities within the boundaries of the San Diego County Air Pollution Control District that are most significantly burdened by, and vulnerable to, high levels of pollution, including communities with diverse racial and ethnic populations and communities with low-income populations. This member may be a resident of that community and have a demonstrated record of community leadership.

(C) One public member shall be a person with a scientific or technical background in air pollution, such as an environmental engineer, chemist, meteorologist, or air pollution specialist. The member shall not be affiliated with any entity that is permitted by the San Diego County Air Pollution Control District or that is a source of air pollution.

(b) All members shall be appointed on the basis of their demonstrated interest and proven ability in the field of air pollution control and their understanding of the needs of the general public in connection with the air pollution problems of the San Diego Air Basin.

(c) All members shall reside within the boundaries of the San Diego County Air Pollution Control District.

(d) (1) The term for each member of the district board shall be four years and until that member’s successor is appointed.

(2) If a city elects not to serve its term, the membership shall rotate to the next city listed in order in the applicable paragraph of subdivision (a).