25000. (a) Each county shall have a board of supervisors consisting of five members. Not more than three members shall be elected at the same general election. If the terms of office of more than three members of the board expire at the same time, at the first regular meeting after January 1st following their election the members so elected shall so classify themselves by lot that three members shall serve for four years, and two for two years. Thereafter the term of office of each member shall be four years. (b) Notwithstanding any other provision of law, the board of supervisors of any general law or charter county may adopt or the residents of the county may propose, by initiative, a proposal to limit or repeal a limit on the number of terms a member of the board of supervisors may serve on the board of supervisors. Any proposal to limit the number of terms a member of the board of supervisors may serve on the board of supervisors shall apply prospectively only and shall not become operative unless it is submitted to the electors of the county at a regularly scheduled election and a majority of the votes cast on the question favor the adoption of the proposal. 25003. The board may make and enforce rules and regulations necessary for the government of the board, the preservation of order, and the transaction of business. 25004. It may adopt a seal. A description and impression of the seal shall be filed in the office of the county clerk. 25005. A majority of the members of the board constitute a quorum for the transaction of business. No act of the board shall be valid or binding unless a majority of all the members concur therein. 25006. Any member of the board may administer oaths when necessary in the performance of his official duties. 25007. Members may attend meetings of the California State Association of Counties. 25008. Members shall be allowed their actual expenses in going to, attendance upon, and returning from state association meetings and their actual and necessary traveling expenses when traveling outside their counties on official business. Reimbursement for these expenses is subject to Sections 53232.2 and 53232.3.