A licensee of the State Board of Accountancy engaged in the practice of public accountancy as defined in Section 5051 of the Business and Professions Code or engaged in an occupation in which the licensee renders services of the type performed by certified public accountants or public accountants or renders other professional services shall observe and is subject to rules and regulations of the State Board of Accountancy in the conduct of such activity. For purposes of Section 5, the term “activity” includes but is not limited to bookkeeping, financial planning, investment planning, tax services and management services.