Regulation 5 Inspection, testing, disconnection etc.
Any officer authorised by the relevant authority may, on production of some duly authenticated document showing his authority—
enter any premises in which there is a service pipe connected with a gas main for the purpose of inspecting any gas fitting on the premises, any flue or means of ventilation used in connection with any such gas fitting, or any part of the gas system on the premises, that is to say, any service pipe or other apparatus (not being a gas fitting) which is on the premises and is used for the conveyance or supply of gas or is connected with a gas main; and
where he so enters any such premises, examine or apply any test to any such object as is mentioned in paragraph (a) and (where the object is a gas fitting) verify what supply of air is available for it; and
where in his opinion it is necessary to do so for the purpose of averting danger to life or property, and notwithstanding any contract previously existing, disconnect and seal off any gas fitting or any part of the gas system on the premises or disconnect the premises or, if the premises are not connected, signify the refusal of the relevant authority to convey gas or, as the case may be, allow gas to be conveyed to the premises.