Cal. Civ. Code § 5:10-11.2

(a) Without relieving the owner of any responsibility placed by these regulations on the owner, any person undertaking for and in behalf of the owner any responsibilities for the operation and maintenance of the premises shall thereby assume concurrently with the owner, responsibilities for the premises and be subject to penalty for failure to comply with any regulation or order relating to any item or matter within the responsibilities so assumed.
(b) Where the owner has vested any other person with active management or control of the property and the owner either by his physical absence or unavailability to the premises has left such person in charge thereof, or by reason of any other arrangement with such person the owner does not actively engage in the day-to-day conduct or operation of the premises, then such person assuming management shall be responsible as the agent of the owner for compliance thereto.
(c) Where there is present on the premises or available to the premises a person whose duties and authority do not comprise overall control of the management of the premises, but such person is designated by the owner as the person responsible for the day-to-day physical upkeep and maintenance of the premises, then such person shall be liable concurrently and jointly with the owner and any managing agent for such matters as shall constitute routine maintenance and upkeep of the premises, for any other matters pertaining to the maintenance of the premises entrusted to such person by the owner or management, and for apprising the owner or managing agent promptly of any other and further matters such as major repairs, structural improvements and capital investments which are beyond such person's authority and competence to undertake, and which, if not done, constitute violations of this chapter or hazards to the health, safety or well-being of occupants.