California Code, Streets and Highways Code - SHC § 27559

The agreements and leases shall be duly acknowledged before a person authorized by law to take acknowledgments of deeds and in the form required for acknowledgment of deeds.  The agreements, leases, and equipment trust certificates shall be authorized by resolution of the district and shall contain the covenants, conditions, restrictions, and provisions which may be deemed necessary or appropriate to insure the payment of the equipment trust certificates from legally available source of funds specified in the certificates.