37. Drainage of buildings in combination.

Where a local authority1 might2 require each of two or more buildings3 to be drained separately into an existing sewer4, but it appears to the authority that those buildings may be drained more economically or advantageously in combination, the authority may, when the drains5 of the buildings are first laid, require that the buildings be drained in combination into the existing sewer by means of a private sewer6 to be constructed7 either by the owners8 of the buildings in such manner as the authority may direct or, if the authority so elects, by the authority on behalf of the