A local authority may agree with any person constructing, or proposing to construct, a sewer or sewage disposal works that, if the sewer or works is or are constructed in accordance with the terms of the agreement, they will upon the completion of the work, or at some specified date, or on the happening of some future event, declare the sewer or works to be vested in them, and any such agreement shall be enforceable against the authority by the owner or occupier for the time being of any premises served by the sewer Or works.
The foregoing provisions of this section shall apply also in relation to drains, but it shall be a condition of any agreement made under those provisions with respect to a drain that the declaration shall not be made before the drain has become a sewer.
A local authority shall not make an agreement under this section with respect to a sewer or drain or sewage disposal works situate within the district of another local authority or within a metropolitan borough, until that other authority or, as the case may be, the council of that borough have consented thereto, or the Minister, on an application made to him, has dispensed with the necessity for such consent, either unconditionally or subject to such conditions as he may think fit to impose.