Cal. Health & Safety Code § 1796.36
(a) A home care organization that has its principal place of business in another state, in addition to the other requirements of this chapter, before arranging for home care services provided by an affiliated home care aide to a client in the state, shall comply with all of the following:
(b) If the home care organization is a foreign corporation, foreign limited liability company, foreign limited partnership, foreign association, or a foreign limited liability partnership, as defined in Sections 170, 171, 171.03, 171.05, and 16101 of the Corporations Code, before arranging for home care services provided by an affiliated home care aide to a client in the state, the home care organization shall have an office in California and shall comply with both of the following: