California Code, Government Code - GOV § 16317

(a) The Controller shall maintain a system of accounts for each of the funds redesignated by the act enacting this section as accounts within the Transportation Tax Fund or the State Transportation Fund which will reflect the equity of each account, including investments and earnings on investments.

(b) No procedures shall be established to implement the act enacting this section which would impair the authority to establish accounting systems, or impair the cash management authority, possessed by the California Highway Commission and the Department of Public Works prior to the enactment of this section.