Cal. Pen. Code § 7432
All proceeds from the sale of bonds, except those derived from premiums and accrued interest, shall be available for the purpose provided in Section 7426 but shall not be available for transfer to the General Fund to pay the principal of and interest on bonds. The money in the fund may be expended only as herein provided.
Notwithstanding any provision of this chapter or the State General Obligation Bond Law set forth in Chapter 4 (commencing with Section 16720) of Part 3 of Division 4 of Title 2 of the Government Code, if the Treasurer sells bonds pursuant to this chapter the interest on which is intended to be excluded from gross income from federal tax purposes, the Treasurer is authorized to maintain separate accounts for the investment of bond proceeds and the investment earnings on the proceeds, and the Treasurer is authorized to use or direct the use of the proceeds or earnings to pay any rebate, penalty, or other payment required under federal law, or to take any other action with respect to the investment and use of bond proceeds required or desirable under federal law so as to maintain the tax-exempt status of those bonds and to obtain any other advantage under federal law on behalf of the funds of this state.
Ca. Pen. Code § 7432