1An application for a control order—
(a)shall specify the area to which the control order sought by the application is to apply and all such other relevant information as the Secretary of State may from time to time require; and
(b)without prejudice to the generality of sub-paragraph (a) above, shall, so far as practicable, include a statement of what the river purification authority concerned consider to be the minimum acceptable flow for each such water, as measured at control points described in that statement.