25.—(1) Subject to paragraphs (2) and (4), the Secretary of State may at any time revoke or vary an authorisation under regulation 22.
(2) Subject to paragraph (3) the Secretary of State is not to revoke or modify an authorisation under regulation 22 without giving at least 6 months’ notice in writing of the Secretary of State’s intention to do so to—
(a)the relevant supplier to which the authorisation relates;
(b)any other relevant supplier which, for the purposes of supplying water to consumers, uses the water supply zone in respect of which the authorised departure has been given;
(c)every appropriate local authority;
(d)Public Health England;
(e)where the authorisation relates to a water supply zone which is wholly or partly in Wales, the National Public Health Service for Wales;
(f)the Council.
(3) The Secretary of State may revoke or vary an authorisation under regulation 22 without notice if it appears to the Secretary of State that immediate revocation or modification is required in the interests of public health.
(4) A relevant supplier on whose application a departure has been authorised under regulation 22 must notify the Secretary of State as soon as the circumstances which gave rise to the application cease to exist, and the Secretary of State must revoke the authorisation without the need for prior notice.
(5) In this regulation, “an authorisation under regulation 22” includes an authorisation for a further or third departure under regulation 23.