20.—(1) This regulation shall apply where the course is a sandwich course unless the student is a member of a religious order and regulation 21 applies.
(2) For the purpose of calculating payments in respect of maintenance under regulation 17(1)(b) 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 such payments shall be made in respect of a year in which there are no periods of full-time study.