For regulation 21 (charges for sampling and analysis) there shall be substituted–
(21)
(1) Subject to the provisions of this regulation, a council may in respect of a private supply serving premises in its area charge any relevant person for expenses reasonably incurred by the council for–
(a) sampling a supply in accordance with these Regulations subject to a maximum charge of £50 per visit to any premises for that purpose; and
(b) the analysis of samples in accordance with these Regulations subject to the maximum charges set out in Schedule 4.
(2) The power to charge mentioned in paragraph (1) does not include a power to charge–
(a) in the case of a class C, D, E, 3, 4 or 5 supply for the taking and analysis of any sample taken pursuant to regulation 14(6); or
(b) for the taking and analysis of any sample taken solely in exercise of the power conferred by regulation 14(9)(a).
(3) Where in relation to any private supply there is more than one relevant person, the council shall, in determining who is to be charged under paragraph (1) and any apportionment of the charge, have regard to the terms (if any) on which the water is supplied and the purposes for which it is used.