The construction of a pipe-line other than by a gas transporter is within section 14(1)(g) only if (when constructed) the pipe-line is expected to be—
A pipe-line is within this subsection if one end of it is in England or Wales and—
For the purposes of section 14(1)(g) and the previous provisions of this section, the construction of a diversion to a pipe-line is treated as the construction of a separate pipe-line.
But if—
the construction of the diversion is treated as the construction of a cross-country pipe-line, whatever the length of the diversion.
For the purposes of subsection (4), a pipe-line is a nationally significant pipe-line if—
"Diversion" means a lateral diversion of a length of a pipe-line (whether or not that pipe-line has been constructed) where the diversion is beyond the permitted limits.
The permitted limits are the limits of lateral diversion permitted by any of the following granted in respect of the construction of the pipe-line—