Where—
different services are provided in relation to the same premises by different service providers ;
one of those providers has obtained a reading from a meter used in determining the amount of any charges fixed in relation to those premises;
the charges in relation to those premises of another of those providers are fixed by reference to any matter to which the reading is relevant; and
that other provider has agreed to bear a reasonable proportion of the expenses of obtaining the reading together with the reasonable expenses of the disclosure of the reading to it,
it shall be the duty of the provider who obtained the reading to disclose the reading to the other provider.
Any dispute between a service provider and any other person (including another such provider)—
as to the terms to be contained in any agreement for the purposes of subsection (1)(d) above; or
as to the amount of any expenses to be borne by any person under any such agreement,
shall be referred to the arbitration of a single arbitrator appointed by agreement between the provider and that person or, in default of agreement, by the Authority.
The duties of a service provider under this section shall be enforceable under section 18 above by the Authority.
For the purposes of this section, the following are service providers—
any relevant undertaker; ...
any water supply licensee.
any sewerage licensee.