All revenues to be received by the department from pledged contracts shall be directly, concurrently and exclusively pledged to the payment of debentures, and all such revenues shall remain so pledged until all of the debentures are fully paid or sufficient funds have been accumulated and are legally available for the payment thereof.
Source:
Section 1003.7, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=MVC§ionNum=1003.7..