Cal. Const. art. XI, § 15

(a) From the revenues derived from taxes imposed pursuant to the Vehicle License Fee Law (Part 5 (commencing with Section 10701) of Division 2 of the Revenue and Taxation Code), or its successor, other than fees on trailer coaches and mobilehomes, over and above the costs of collection and any refunds authorized by law, those revenues derived from that portion of the vehicle license fee rate that does not exceed 0.65 percent of the market value of the vehicle shall be allocated as follows:
1. (1) An amount shall be specified in the Vehicle License Fee Law, or the successor to that law, for deposit in the State Treasury to the credit of the Local Revenue Fund established in Chapter 6 (commencing with Section 17600) of Part 5 of Division 9 of the Welfare and Institutions Code, or its successor, if any, for allocation to cities, counties, and cities and counties as otherwise provided by law.
2. (2) The balance shall be allocated to cities, counties, and cities and counties as otherwise provided by law.
(b) If a statute enacted by the Legislature reduces the annual vehicle license fee below 0.65 percent of the market value of a vehicle, the Legislature shall, for each fiscal year for which that reduced fee applies, provide by statute for the allocation of an additional amount of money that is equal to the decrease, resulting from the fee reduction, in the total amount of revenues that are otherwise required to be deposited and allocated under subdivision (a) for that same fiscal year. That amount shall be allocated to cities, counties, and cities and counties in the same pro rata amounts and for the same purposes as are revenues subject to subdivision (a).