Cal. Pub. Util. Code § 130057

It is the intent of the Legislature that, after the development and approval of the short-range transportation improvement program pursuant to subdivision (b) of Section 130303, the transportation agencies responsible for the implementation of the program shall be granted discretion on how to best implement the program. Any changes made in the program by such an agency in its implementation shall be consistent with the purposes of the program, and the commission shall be immediately notified of such changes.