Cal. Sts. & Hy. Code § 2106.4
From funds apportioned to the County of Los Angeles pursuant to Sections 2104, 2105, and 2106, or from other transportation funds available to the county, or from any combination of those funds, as determined by the county, the county shall, beginning in the 1996-97 fiscal year, commence the annual transfer to the Los Angeles County Metropolitan Transportation Authority of funds in an amount calculated to amortize, in equal annual installments over a 5-year period, the amount by which fiscal realignment revenues deposited in the county general fund exceed fifty million dollars ($50,000,000). The highest priority for the use of the remaining funds apportioned to the county pursuant to this chapter shall be for safety and for maintenance of county facilities in urban areas with the highest backlog of maintenance and rehabilitation needs.
Ca. Sts. and High. Code § 2106.4