California Code, Government Code - GOV § 31493.5

(a) Any person employed who qualifies as a member shall certify to the board his or her election to be covered by the retirement plan established by this article or to be covered by the retirement provisions and benefits otherwise available to members as of the date of employment. Any person who dies prior to certifying his or her election or who fails to certify his or her election within the period set forth in subdivision (b) shall, as of the date of death or the day immediately following the last day to certify his or her election, be deemed to have elected to be covered by the retirement plan established by this article.

(b) The election required to be made by subdivision (a) shall be certified to the board:

(c) The employer shall, within 14 days of the date of employment, provide to each person who qualifies as a member, written disclosure materials of the elements of each of the available retirement plans.

(d) This section shall be applicable to persons eligible for general membership in Plans D and E who become employed on or after January 1, 1991, and prior to January 1, 1992, and to persons who were employed prior to January 1, 1991, who first became eligible for membership on or after January 1, 1991, and before January 1, 1992.