Cal. Pub. Util. Code § 132351.2

(a) A majority of the member agencies constitute a quorum for the transaction of business. In order to act on any item, the affirmative vote of the majority of the members of the board present is required. However, after a vote of the members is taken, a weighted vote may be called by the members of any two jurisdictions.
(b) The governing body of the City of San Diego and the County of San Diego shall allocate their weighted votes equally between their primary and secondary members.
(c) For the weighted vote, there shall be a total of 100 votes, except additional votes shall be allowed pursuant to subdivision (h). Each member agency shall have that number of votes determined by the following apportionment formula, provided that each agency shall have at least one vote, no agency shall have more than 50 votes, and there shall be no fractional votes:
1. (1) If any agency has 50 percent or more of the total population of the San Diego County region, allocate 50 votes to that agency and follow paragraph (2), and if not, follow paragraph (3).
2. (2) Total the population of the remaining agencies determined in paragraph (1) and compute the percentage of this total that each agency has.
  1. (A) Multiply each percentage derived above by 50 to determine fractional shares.
  2. (B) Boost fractions that are less than one to one and add the whole numbers.
  3. (C) If the answer to subparagraph (B) is 50, drop all fractions and the whole numbers are the votes for each agency.
  4. (D) If the answer to subparagraph (B) is less than 50, the remaining vote is allocated one each to the agency having the highest fraction excepting those whose vote was increased to one pursuant to subparagraph (B).
  5. (E) If the answer to subparagraph (B) is more than 50, the excess vote is taken one each from the agency with the lowest fraction. In no case shall a vote be reduced to less than one.
3. (3) Total the population determined in paragraph (1) and compute the percentage of this total that each agency has.
  1. (A) Boost fractions that are less than one to one and add the whole numbers.
  2. (B) If the answer to subparagraph (A) is 100, drop all fractions and the whole numbers are the votes for each agency.
  3. (C) If the answer to subparagraph (A) is less than 100, the remaining vote is allocated one each to the agency having the highest fraction excepting those whose vote was increased to one pursuant to subparagraph (A).
  4. (D) If the answer to subparagraph (A) is more than 100, the excess vote is taken one each from the agency with the lowest fraction. In no case shall a vote be reduced to less than one.
(d) When a weighted vote is taken on any item that requires more than a majority vote of the board, it shall also require the supermajority percentage of the weighted vote.
(e) Approval under the weighted vote procedure requires the vote of not less than four members representing separate jurisdictions and not less than 51 percent of the total weighted vote to supersede the original action of the board.
(f) For purposes of subdivision (c), the population of the County of San Diego is the population in the unincorporated area of the county.
(g) The weighted vote formula under subdivision (c) shall be recomputed every July 1.
(h) Any newly incorporated city shall receive one vote under the weighted vote procedure until the next recomputation of the weighted vote formula under subdivision (c), at which time the new agency shall receive votes in accordance with the recomputed formula. Until this recomputation, the total weighted vote may exceed 100.