Regulation 31

A person must not tamper or otherwise interfere with any water service installation used by an approved person for the supply of piped water suitable for drinking, in a manner that causes, or is likely to cause, any contamination or other adverse effect on the quality of such water.

Any person who contravenes paragraph (1) shall be guilty of an offence.

It is a defence to any prosecution for an offence under paragraph (2) if the accused proves, on a balance of probabilities, that the accused interfered with the water service installation solely for the purpose of maintaining the water service installation on behalf of the approved person.