Cal. SHC § 31477

(a) SANDAG may enter into one or more agreements with the County of San Diego or a city within the County of San Diego to accept fees imposed by that city or the county pursuant to the Subdivision Map Act (Division 2 (commencing with Section 66410) of Title 7 of the Government Code) or the Mitigation Fee Act (Chapter 5 (commencing with Section 66000), Chapter 6 (commencing with Section 66010), Chapter 7 (commencing with Section 66012), Chapter 8 (commencing with Section 66016), and Chapter 9 (commencing with Section 66020) of Division 1 of Title 7 of the Government Code), to reimburse SANDAG for costs it has or will incur to mitigate development that will have a negative impact on the movement of people or goods in or along the State Route 11 corridor or the Otay Mesa East Port of Entry.

(b) Fees paid to a city or the county and transferred to SANDAG pursuant to this section shall be expended by SANDAG solely for the construction or reimbursement for construction of the improvement serving the area to be benefited and from which the fees transferred from the city or county were collected.

(c) The agreement may provide for the acceptance of considerations in lieu of the payment of fees.

(d) If the provisions of this section, or provisions implementing this section contained in any ordinance adopted pursuant to this section, are held invalid, that invalidity shall not affect other provisions of this section or of the ordinance adopted pursuant thereto, which can be given effect without the invalid provision, and to this end the provisions of this section and of an ordinance adopted pursuant thereto are severable.