4.—(1) Subject to sub-paragraphs (2) and (3), the number of rent assessment committees, the areas for which those committees shall act and the constitution of those committees shall be determined by the Department.
(2) Subject to sub-paragraph (3), each rent assessment committee shall consist of a chairman and one or two other members.
(3) The Department may direct that, when dealing with a case in such circumstances as may be specified in the direction, the chairman sitting alone may, with the consent of the parties, exercise the functions of a rent assessment committee.