The conditions prescribed under sections 144A(5)(b) (additional conditions for revoking a measured charges notice) and 144B(1)(c) (additional conditions for changes in the basis of charging) of the Water Industry Act 1991 are that–
(a) in the case of premises which are not used solely as a person’s home, that other use is not the principal use of the premises;
(b) the water supplied to the premises is not used–
(i) for watering a garden, other than by hand, by means of any apparatus;
(ii) for automatically replenishing a pond, or a swimming pool, with a capacity greater than 10,000 litres;
(iii) in a bath with a capacity (measured to the centre line of overflow) greater than 230 litres;
(iv) in a shower unit of a type specified under paragraph 4(c) of the Table to regulation 5 of the Water Supply (Water Fittings) Regulations 1999 ;
(v) in a unit which incorporates reverse osmosis; and
(c) the premises are not in an area which has been determined by the Secretary of State to be an area of water scarcity for the purposes of these Regulations under regulation 3 below.