An appeal shall not lie under Regulation H5 or H6 against anything done by a police authority in the exercise of a power conferred by these Regulations which is expressly declared thereby to be a power which they are to exercise in their discretion.

Subject to Regulation H3(1), in any proceedings under Regulation H5 or H6 the court or tribunal shall be bound by any final decision of a medical authority within the meaning of Regulation H3.