California Constitution Article XIX Section 3

SEC. 3. The Legislature shall provide for the allocation of the revenues to be used for the purposes specified in Section 1 of this article in a manner which ensures the continuance of existing statutory allocation formulas for cities, counties, and areas of the State, until it determines that another basis for an equitable, geographical, and jurisdictional distribution exists; provided that, until such determination is made, any use of such revenues for purposes specified in subdivision (b) of Section 1 of this article by or in a city, county, or area of the State shall be included within the existing statutory allocations to, or for expenditure in, that city, county, or area. Any future statutory revisions shall provide for the allocation of these revenues, together with other similar revenues, in a manner which gives equal consideration to the transportation needs of all areas of the State and all segments of the population consistent with the orderly achievement of the adopted local, regional, and statewide goals for ground transportation in local general plans, regional transportation plans, and the California Transportation Plan.