Cal. CIV § 1954.602

(a) A landlord shall not show, rent, or lease to a prospective tenant any vacant dwelling unit that the landlord knows has a current bed bug infestation. (b) This section does not impose a duty on a landlord to inspect a dwelling unit or the common areas of the premises for bed bugs if the landlord has no notice of a suspected or actual bed bug infestation. If a bed bug infestation is evident on visual inspection, the landlord shall be considered to have notice pursuant to this section.