Cal. Gov. Code § 22970.58

The board may permit a participant to transfer funds, including eligible rollover contributions, from an eligible retirement plan into this plan to the extent that the transfers are allowed under applicable federal and state laws, and pursuant to the terms and conditions established by the board. The plan may accept rollover contributions made in accordance with paragraph (4) of subdivision (b) of Section 22960.4 if the board establishes a separate rollover contribution account for each participant or beneficiary who makes such rollover contributions for the purpose of holding those contributions. Rollover contributions made in accordance with paragraph (4) of subdivision (b) of Section 22960.4, shall be invested in the applicable target retirement date fund investment fund option available under the plan until the participant elects another investment fund option available under the plan in accordance with the terms and conditions established by the board.