4.—(1) The Department shall have the power to give directions in writing to a district council concerning the execution and enforcement by it of any provisions of these Regulations for which that council is responsible.
(2) In the exercise of the functions conferred on it by these Regulations, a district council shall comply with all relevant provisions of a direction given to it under paragraph (1).
(3) Any directions given under paragraph (1) shall, on the application of the Department, be enforceable by mandamus.