California Code, Revenue and Taxation Code - RTC § 7102.1

(a) On and after April 1, 2023, and before April 1, 2024, the California Department of Tax and Fee Administration, with the concurrence of the Department of Finance, shall, on a quarterly basis, estimate the revenues, less refunds, that, if not for Section 6357.4, would have been derived under this part at the 4 3/4 -percent rate, excluding the portion of the 4 3/4 -percent rate that is deposited in the State Treasury and credited to the Local Revenue Fund 2011 pursuant to Section 6051.15 or 6201.15, from the imposition of sales and use taxes on fuel, as defined for purposes of the Diesel Fuel Tax Law (Part 31 (commencing with Section 60001)).

(b) The Controller shall, on a quarterly basis, transfer the estimated amount from the Retail Sales Tax Fund to the Public Transportation Account, a trust fund in the State Transportation Fund.

(c) The quarterly estimates required by subdivision (a) shall be based on taxable transactions from October 1, 2022, to September 30, 2023, inclusive.