Except as provided in subsection (b) of this section, debarment proceedings under this title must be instituted within 5 years after:the conviction or judgment that constitutes cause for debarment has become final; the admission that constitutes cause for debarment has been made; or the occurrence of any other event that constitutes a cause for debarment. Debarment proceedings may be brought after the period set forth in subsection (a) of this section if they are instituted within 1 year of when the Board discovered or, by the exercise of ordinary diligence, should have discovered the grounds for debarment. Ord. 00-005