1E+W+SIn Scotland, a person who holds a licence under section 6(1)(a) of this Act may be authorised by the Secretary of State to abstract and divert from any watercourse or loch and to use such water as may be necessary for the purposes of constructing or extending a generation station wholly or mainly driven by water and of operating that generating station after such construction or extension ; but he shall do as little damage as possible in the exercise ofthe powers conferred by the authorisation and shall make compensation for any damage done in the exercise of those powers.