California Code, Health and Safety Code - HSC § 50755

The department may contract with local public entities to provide funds to be used by those entities to obtain a right of occupancy or leasehold for eligible households in some or all of the units in a rental housing development. In order to maximize the number of units for which a right of occupancy or leasehold is obtained, the payment made by the local public entity in obtaining the right or leasehold shall not exceed the costs of developing the unit. The local public entity may be authorized by the department to pay the entire amount of the development costs as soon as the unit is available for occupancy.

Any contract executed pursuant to this article which provides for a right of occupancy or leasehold in favor of a local public entity shall be recorded or referenced in a recorded document in the office of the county recorder of the county in which the real property is located. The contract shall particularly describe the real property subject to the right of occupancy or leasehold, designate the specific rental units or proportion of the rental housing development subject to the right of occupancy or leasehold, and specify the period for which the right of occupancy or leasehold extends.