If it appears to a local authority that in the case of a building—
they shall by notice require the owner of the building to make satisfactory provision for the drainage of the building, or, as the case may be, require either the owner or the occupier of the building to do such work as may be necessary for renewing, repairing or cleansing the existing cesspool, sewer, drain, pipe, spout, sink or other appliance, or for filling up, removing or otherwise rendering innocuous the disused cesspool, sewer or drain.
Sections 99 and 102 below apply in relation to a notice given under subsection (1) above.
Subsections (4), (5) and (6) of section 21 above apply in relation to a drain that a local authority require to be constructed under this section as they apply in relation to such a proposed drain as is mentioned in that section.
Subsection (1) above, so far as it empowers a local authority to take action in the cases mentioned in paragraphs (a) and (b) of the subsection, does not apply in relation to a building belonging to statutory undertakers . . . the Civil Aviation Authority or a person who holds a licence under Chapter I of Part I of the Transport Act 2000 (air traffic services) and held or used by such a body or person for the purpose of that body's or that person's undertaking, unless it is—
For the purposes of subsection (4) above, the undertaking of a person who holds a licence under Chapter I of Part I of the Transport Act 2000 shall be taken to be the person's undertaking as licence holder.
In subsection (1) above, "drainage" includes the conveyance, by means of a sink and any other necessary appliance, of refuse water and the conveyance of rainwater from roofs.
Schedule 3 to the Flood and Water Management Act 2010 extends the power under subsection (1)(c) of this section to sustainable drainage systems as defined in regulations under that Schedule.