(2) at any time, if the applicant(a) misrepresented the facts through negligence or wilful omission, committed fraud in making his application or furnishing any other information for the purpose of obtaining a certificate contemplated in section 220.2 or payment of a reimbursement provided for by this subdivision;
(b) did not respect the undertakings contracted to obtain the issue of such certificate to him; or
(c) filed a waiver with the Minister in prescribed form.