Section 4
The Secretary of State is also authorised to construct—
(a)
as parts of the Motorway, the bridges specified in schedules 3 and 4 below, and
(b)
as part of the M6 Motorway, the bridge specified in Schedule 5 below,
and in connection with the construction of those bridges, to divert the parts of the navigable watercourses respectively specified in those schedules in the manner shown therein.