California Code, Corporations Code - CORP § 13403

The provisions of the General Corporation Law shall apply to professional corporations, except where such provisions are in conflict with or inconsistent with the provisions of this part. A professional corporation which has only one shareholder need have only one director who shall be such shareholder and who shall also serve as the president and treasurer of the corporation. The other officers of the corporation in such situation need not be licensed persons. A professional corporation which has only two shareholders need have only two directors who shall be such shareholders. The two shareholders between them shall fill the offices of president, vice president, secretary and treasurer.

A professional medical corporation may establish in its articles or bylaws the manner in which its directors are selected and removed, their powers, duties, and compensation. Each term of office may not exceed three years. Notwithstanding the foregoing, the articles or bylaws of a professional medical corporation with more than 200 shareholders may provide that directors who are officers of the corporation or who are responsible for the management of all medical services at one or more medical centers may have terms of office, as directors, of up to six years; however, no more than 50 percent of the members of the board, plus one additional member of the board, may have six-year terms of office.