Where a local authority are supplying water to any premises within the limits of supply of statutory water undertakers by virtue of a consent given by those undertakers, whether voluntarily or in compliance with a decision of the Minister, under any of the foregoing provisions of this Part of this Act, those undertakers may, in the absence of any agreement to the contrary, at any time give not less than one month's notice to the supplying authority that they are able and intend to give a supply of water to the premises in question.
When a notice has been given under this section, then, so soon as, after the expiration of one month, the statutory undertakers commence to supply water to the premises in question, the rights and duties of the local authority in respect of a supply thereto shall cease, but the statutory undertakers shall pay to the local authority such portion of any expenses reasonably incurred by the authority for the purpose of giving a supply to those premises as may be agreed or, failing agreement, determined by arbitration.