4. In regulation 16, after paragraph (11) shall be inserted the following paragraph—
“(11A) The holder of a disability assessment licence shall not drive a vehicle of a class which he is authorised to drive by virtue of the licence otherwise than during a period which—
(a)commences with the beginning of such period prior to the taking of the disability assessment test required by a relevant notice as is specified in writing by the Secretary of State when serving that notice; and
(b)ends with the completion of the test;
and, for these purposes, a “relevant notice” is a notice under section 94(5)(c) of the Traffic Act requiring the person to submit to a disability assessment test.”