Regulation 32 Use of processes
The Secretary of State may at any time by notice in writing given to a water undertaker require it to make an application to him for approval of the use of any process; and may prohibit it for such period as may be specified in the notice from using any such process in connection with the supply by it of water for regulation 4(1) purposes.
The Secretary of State may refuse the application or impose on any approval given for the purposes of this regulation such conditions as he thinks fit and, subject to paragraph (3), may at any time by notice in writing to the water undertaker revoke an approval so given or modify or revoke any condition imposed by virtue of this paragraph.
Subject to paragraph (4), the Secretary of State shall not—
revoke any approval given for the purposes of this regulation;
modify any condition imposed by virtue of paragraph (2); or
prohibit a water undertaker from using any process,
unless he has given to the water undertaker at least 6 months' notice in writing of his intention to revoke, modify or prohibit, as the case may be.
Paragraph (3) shall not apply in any case in which the Secretary of State is of the opinion that the immediate revocation, modification or prohibition is necessary in the interests of public health.
Paragraph (12) of regulation 31 shall apply for the purposes of this regulation as if—
for the reference to a substance or product there were substituted a reference to a process; and
for the reference to paragraph (4)(a) and paragraph (8) there were substituted a reference to this regulation and paragraph (1) of this regulation respectively.