15Agreements as to drainage, etc., of land.
(1)Statutory water undertakers may enter into agreements with the owners and occupiers of any land, or with a local authority, with respect to the execution and maintenance by any party to the agreement of such works as the undertakers consider necessary for the purpose of draining that land, or for more effectually collecting, conveying, or preserving the purity of, water which the undertakers are for the time being authorised to take:
Provided that, where the execution of any such works would result in the discharge of water, otherwise than through public sewers, into any watercourse which is within a catchment area or fishery district or is subject to the jurisdiction of a navigation authority or rivers board, the undertakers shall before entering into the agreement consult with the catchment board, fishery board, navigation authority or rivers board concerned.
(2)An agreement under this section with an owner of land may be registered under section ten of the [15 & 16 Geo. 5. c. 22.] Land Charges Act, 1925, as an obligation affecting land falling within Class D, and shall, unless it is void by reason of a failure so to register it, be binding upon and enforceable against his successors in title to that land:
Provided that this subsection shall only apply to such an agreement if it is expressed to be binding and enforceable as aforesaid.
(3)An agreement under this section with a local authority may extend to the execution and maintenance by that authority of works of sewerage and sewage disposal.