Cal. Penal Code § 1462.5

Each installment or partial payment of a fine, penalty, forfeiture or fee shall be prorated among the state and local shares according to the uniform accounting system established by the State Controller pursuant to Section 71380 of the Government Code. In cases subject to Section 1463.18 of the Penal Code, proration shall not occur until the minimum amounts have been transferred to the Restitution Fund as provided in that section.