1Where the driver is the owner of the vehicle, he may at the time of electing that the test shall be deferred—
(a)specify a period of seven days within which the deferred test is to take place, being a period falling within the next thirty days, disregarding any day on which the vehicle is outside Great Britain, and
(b)require that the deferred test shall take place on premises then specified by him where the test can conveniently be carried out or that it shall take place in such area in England and Wales, being a county district or Greater London, or such area in Scotland, being an islands area or district, as he may specify at that time.