3.—(1) The Department may by regulations make provision—
(a)for empowering any person authorised by a relevant licence holder, where that licence holder has reasonable cause to suspect—
(i)that gas conveyed by him is escaping, or may escape, in any premises; or
(ii)that gas so conveyed which has escaped has entered, or may enter, any premises,
to enter the premises, to inspect the gas system and gas fittings, to carry out any work necessary to prevent the escape of gas and to take any other steps necessary to avert danger to life or property; and
(b)for empowering any person authorised by a relevant licence holder, where that licence holder has reasonable cause to suspect—
(i)that gas conveyed by some other person is escaping, or may escape, in any premises; or
(ii)that gas so conveyed which has escaped has entered, or may enter, any premises,
to enter the premises and to take any steps necessary to avert danger to life or property.
(2) As soon as reasonably practicable after any powers are exercised under sub-paragraph (b) of paragraph (1) by a person authorised by a relevant licence holder, that licence holder shall inform the other person referred to in head (i) of that sub-paragraph.
(3) The Department may by regulations make provision for empowering any person authorised by it, if it has reasonable cause to suspect—
(a)that gas conveyed by any person other than a relevant licence holder is escaping, or may escape, in any premises; or
(b)that gas so conveyed which has escaped has entered, or may enter, any premises,
to enter the premises, to inspect the gas system and gas fittings, to carry out any work necessary to prevent the escape of gas and to take any other steps necessary to avert danger to life or property.