Notwithstanding any other provision of law, if a school district governing board consists of seven (7) members and not more than two vacancies occur on the governing board, the vacant position or positions shall not be counted for purposes of determining how many members of the board constitute a majority; and, whenever any of the provisions of this code require unanimous action of all or a specific number of the members elected or appointed to the governing board, the vacant position or positions shall be excluded from determination of the total membership constituting the governing board.