20.—(1) This regulation shall apply where the course is a sandwich course unless—
(a)the student is a member of a religious order and regulation 21 applies; or
(b)the course is a course for the initial training of teachers designated under regulation 10(1)(d).
(2) For the purpose of calculating payments … under regulation 17 in respect of a sandwich year, that regulation and Schedules 2 and 3 shall have effect subject to the provisions of Schedule 5; but no payments in respect of maintenance shall be made in respect of a year in which there are no periods of full-time study.