Nothing in this article shall be construed as affecting or impairing the disciplinary powers and authority of the Supreme Court or of the State Bar in respect of conduct of licensees of the State Bar nor modifying the statutes and rules governing such conduct, except as expressly provided in this article and except that licensees of the State Bar may properly render legal services as officers or employees of a law corporation and may participate as shareholders, officers, and directors thereof, under the terms and conditions provided by this article and the Professional Corporation Act.