Business and Professions Code § 6160

A law corporation is a corporation which is registered with the State Bar of California and has a currently effective certificate of registration from the State Bar 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 this article. Subject to all applicable statutes, rules and regulations, such law corporation is entitled to practice law. With respect to a law corporation the governmental agency referred to in the Professional Corporation Act is the State Bar.