California Code, Government Code - GOV § 31851

In addition to the contributions required elsewhere in this chapter there shall be deducted from the salary or wages of each member (to finance the costs of the benefits provided in this article) an amount specified in the regulations of the board.  The board shall fix the additional contributions of members at amounts which it finds will pay one-half of the cost of the survivors' benefits and lump sum supplemental survivorship benefit provided for in this article.  Unless and until such regulations otherwise provide such amount shall equal eighty-eight cents ($0.88) per month for safety members and sixty-eight cents ($0.68) per month for all other members.