Gov. Code, § 64123

The State of California does pledge to and agree with the holders of the bonds issued pursuant to this division, and with those parties who may enter into contracts with the authority or a project sponsor pursuant to this division, that the state will not limit, alter, or restrict the rights hereby vested in the authority or a project sponsor to finance or refinance projects and to authorize the imposition and collection of tolls and to fulfill the terms of any agreements made with the holders of bonds authorized by this division, and with the parties who may enter into contracts with the authority or a project sponsor pursuant to this division, or in any way impair the rights or remedies of the holders of those bonds or those parties until the bonds, together with interest thereon, are fully paid and discharged and the contracts are fully performed on the part of the authority or a project sponsor. The authority, and the project sponsor, as a public body, corporate and politic, shall have the right to include the pledge herein made in its bonds and contracts.