54.—(1) A person who fulfils the conditions mentioned in Article 53(1)(a) and (b) may, for the purposes of obtaining an emergency control certificate, apply to undergo an emergency control assessment.
(2) Regulations may specify modifications of a motor vehicle as modifications which are to be required for a motor vehicle to be an appropriate motor vehicle for the purposes of this Part or as modifications which are not to be required for a motor vehicle to be an appropriate motor vehicle for those purposes.
(3) Regulations may make provision for prescribed persons to be exempt from Article 53(1)(c) in prescribed circumstances.
(4) The Registrar may refuse to register a person under Article 53 if he is satisfied that the person has at any time refused to comply with a requirement under Article 66(2) to submit himself for a further emergency control assessment.
(5) The Registrar must, on making a decision on an application under Article 53, give notice in writing of his decision to the applicant which, in the case of a decision to refuse the application, must state the grounds for the refusal.