4.—(1) The Planning Appeals Commission shall determine the appeal and paragraphs (1), (3), (4) and (5) of Article 111 of the Planning (Northern Ireland) Order 1991 shall apply in relation to the determination of the appeal as they apply in relation to the determination of an appeal under that Order.
(2) If either party to the appeal so requests, the Planning Appeals Commission shall afford to each of them an opportunity of appearing before and being heard by the Planning Appeals Commission.
(3) A hearing held under sub-paragraph (2) may, if the Planning Appeals Commission so decides, be held wholly or held to any extent, in private.