Regulation 9 Adjustment of charges
Subject to paragraphs (2) and (3), an account shall be taken of the sums payable by the undertakers or by the customer for any period during which the meter has or is deemed to have registered incorrectly; and the balance shall be paid or allowed by the undertakers or paid by the customer, as the case may be.
Where a meter which is connected to a supply of water to a house is proved to have registered less than the volume of water supplied to that house, the balance payable by the customer shall not exceed an amount reflecting the charge for the volume of water which would ordinarily have been supplied to the house during the six months preceding the last occasion on which the undertakers or any person duly authorised by them last read the meter for the purpose of ascertaining the volume of water supplied to the house, less any sums already paid in respect of that period.
Nothing in this regulation shall affect the liability of the customer or the undertakers in respect of any period of account commencing before 11th July 1988.