Cal. Bus. & Prof. Code § 6127.5

Nothing in Sections 6125, 6126 and 6127 shall be deemed to apply to the acts and practices of a law corporation duly certificated pursuant to the Professional Corporation Act, as contained in Part 4 (commencing with Section 13400) of Division 3 of Title 1 of the Corporations Code, and pursuant to Article 10 (commencing with Section 6160) of Chapter 4 of Division 3 of this code, when the law corporation is in compliance with the requirements of (a) the Professional Corporation Act; (b) Article 10 (commencing with Section 6160) of Chapter 4 of Division 3 of this code; and (c) all other statutes and all rules and regulations now or hereafter enacted or adopted pertaining to such corporation and the conduct of its affairs.