if the failure consists of the plan not being terminated as required under paragraph (4)(p) and was due either to the issuer not being aware of the beneficiary having died or having ceased to be a DTC-eligible individual or to some uncertainty as to the beneficiary having ceased to be a DTC-eligible individual, the Minister may specify a later date by which it is reasonable to assume that the plan can be terminated in an orderly manner and, for the purposes of paragraphs (11)(a) and (b), paragraph (4)(p) and the plan terms are to be read as though they required the plan to be terminated by that date.