(a) The account is hereby designated a trust fund.

(b) The funds in the account shall be available, when appropriated by the Legislature, only for transportation planning and mass transportation purposes, as specified by the Legislature.

(c) The Legislature may amend this section by statute passed in each house of the Legislature by rollcall vote entered in the journal, two-thirds of the membership concurring, if the statute is consistent with, and furthers the purposes of, this section.

(Amended June 5, 1990, by initiative Proposition 116, Sec. 2.)