California Code, Civil Code - CIV § 1941.7

(a) An obligation shall not arise under Section 1941 or 1942 to repair a dilapidation relating to the presence of mold pursuant to paragraph (13) of subdivision (a) of Section 17920.3 of the Health and Safety Code until the lessor has notice of the dilapidation or if the tenant is in violation of Section 1941.2.

(b) A landlord may enter a dwelling unit to repair a dilapidation relating to the presence of mold pursuant to paragraph (13) of subdivision (a) of Section 17920.3 of the Health and Safety Code provided the landlord complies with the provisions of Section 1954.