2Power to deviate
(1)In constructing or maintaining any of the scheduled works, the authorised undertaker may—
(a)deviate laterally from the lines or situations shown on the Parliamentary plans within the limits of deviation for that work shown on those plans, and
(b)deviate vertically from the levels shown on the Parliamentary sections—
(i)to any extent not exceeding 3 metres upwards, and
(ii)to any extent downwards.
(2)The authorised undertaker may in constructing or maintaining any of the authorised tramroads or authorised road tramways lay down—
(a)double lines of rails instead of single lines,
(b)single lines of rails instead of double lines,
(c)interlacing lines of rails instead of double or single lines, or
(d)double or single lines of rails instead of interlacing lines.
(3)The power in subsection (2) shall not be exercised in the case of any authorised road tramway without the consent of the road works authority, but such consent shall not be unreasonably withheld.
(4)The authorised undertaker may in constructing and maintaining any of the authorised tramroads provide within the limits of deviation for those tramroads such number of lines of rails and sidings as may be necessary or expedient.