In article 1(2) of the 1988 Order (interpretation)—
(a) omit the definitions of “hazardous substance” and “notifiable quantity”;
(b) for the definition of “notifiable pipeline” substitute—
“notifiable pipe-line” means a pipe-line, as defined in section 65 of the Pipe-lines Act, 1962 , which contains or is intended to contain a hazardous substance, as defined in regulation 2(1) of the Notification Regulations, except—
(a) a pipe-line the construction of which has been authorised under section 1 of the Pipe-lines Act, 1962; or
(b) a pipe-line which contains or is intended to contain no hazardous substance other than—
(i) a flammable gas (as specified in item 1 of Part II of Schedule 1 to the Notification Regulations) at a pressure of less than 8 bars absolute; or
(ii) a liquid or mixture of liquids, as specified in item 4 of Part II of that Schedule;