California Code, Civil Code - CIV § 1942.9

(a) Notwithstanding any other law, a landlord shall not, with respect to a tenant who has COVID-19 rental debt, as that term is defined in Section 1179.02 of the Code of Civil Procedure, and who has submitted a declaration of COVID-19-related financial distress, as defined in Section 1179.02 of the Code of Civil Procedure, do either of the following:

(b) Notwithstanding any other law, a landlord who temporarily reduces or makes unavailable a service or amenity as the result of compliance with federal, state, or local public health orders or guidelines shall not be considered to have violated the rental or lease agreement, nor to have provided different terms or conditions of tenancy or reduced services for purposes of any law, ordinance, rule, regulation, or initiative measure adopted by a local governmental entity that establishes a maximum amount that a landlord may charge a tenant for rent.