Sewerage and Drainage (Protection of Public Sewerage System) Regulations 2017.

These Regulations are enacted in accordance with the the Sewerage and Drainage Act.
A contractor who is engaged in or is to carry out any specified activity within a part of a public sewer corridor must ensure that the activity is carried out in accordance with an approved plan (including any amendment permitted to the plan) for the activity. Where the carrying out in a part of a public sewer corridor of any specified activity with an approved plan is likely to damage any part of the public sewerage system which runs through that corridor, the Board may require a responsible person of the activity to — (a) comply with such requirements as the Board thinks fit to impose; and (b) take such measures as may be necessary, to prevent, stop or remedy any damage to the public sewerage system. The Regulations further makes provisions, inter alia, for offences and penalties.