A covered noncareer employee shall not:

(a) Receive outside earned income in excess of the 15 percent limitation described in §2636.304 of this subpart;

(b) Receive compensation or allow the use of his name in violation of the restrictions relating to professions involving a fiduciary relationship described in §2636.305 of this subpart;

(c) Receive compensation for serving as an officer or board member in violation of the restriction described in §2636.306 of this subpart; or

(d) Receive compensation for teaching without having first obtained advance authorization as required by §2636.307 of this subpart.