Any individual director, officer, or agent of a corporation who willfully authorizes, orders, or performs any of the acts or practices constituting in whole or in part a violation of this chapter, or any rule or order thereunder, shall be subject to penalties under this section without regard to any penalties to which the corporation may be subject, except that no such individual director, officer, or agent shall be subject to imprisonment under section
8432 of this title, unless he also knew of noncompliance by the corporation or had received from the Secretary notice of noncompliance by the corporation.