5.—(1) Subject to paragraph (2), in these Regulations “pipe-line” means a pipe or system of pipes for the conveyance of any thing, together with any apparatus and works associated with such a pipe or system.
(2) A “pipe-line” does not include—
(a)a drain or sewer;
(b)a pipe or system of pipes constituting or comprised in apparatus for heating or cooling or for domestic purposes;
(c)a pipe or system of pipes on the site of any operations or works to which certain provisions of the Factories Act (Northern Ireland) 1965(1) apply by virtue of section 125(1) of that Act (building operations and works of engineering construction);
(d)a pipe or system of pipes wholly situated within the boundaries of any land occupied as a unit for purposes of agriculture (within the meaning of the Agriculture Act (Northern Ireland) 1949(2)), where the pipe or system of pipes is designed for use for purposes of agriculture;
(e)a pipe or system of pipes wholly situated in premises used for the purposes of education or research.
(3) For the purposes of these Regulations the following apparatus and works, and no other, shall be treated as being associated with a pipe, or system of pipes, namely—
(a)apparatus for inducing or facilitating the flow of anything through, or through a part of, the pipe or system;
(b)valves, valve chambers, manholes, inspection pits and similar works, being works annexed to, or incorporated in the course of, the pipe or system;
(c)apparatus for supplying energy for the operation of any such apparatus or works as are mentioned in sub-paragraph (a) or (b);
(d)apparatus for the transmission of information for the operation of the pipe or system;
(e)apparatus for affording cathodic protection to the pipe or system;
(f)a structure for the exclusive support of a part of the pipe or system;
(g)in relation only to a pipe, or system of pipes, which is used to convey carbon dioxide to a storage site, apparatus for treating and cooling carbon dioxide which is to flow through, or through part of, the pipe or system.
(4) In paragraph (3)(g), the reference to a pipe, or system of pipes, which is used to convey carbon dioxide includes a pipe or system which is not being used for any purpose but which is intended to be used to convey carbon dioxide.