Cal. Civ. Code § 4-2914

(a) A family that receives a voucher under the State Program shall:

(1) supply any information to the Department or the public housing agency necessary for the administration of the State Program;

(2) notify the Department or the public housing agency before vacating the unit;

(3) use the unit only as a principal place of residence; and

(4) maintain all utilities that are not paid through the housing assistance payment.

(b) A family that receives a voucher under the State Program may not:

(1) own the unit that the assistance is provided for;

(2) commit fraud in connection with the State Program;

(3) sublease or assign the lease or transfer the unit; or

(4) allow anyone not on the unit lease to reside in the unit.