No power (whether a power of compulsory acquisition or other compulsory power, a power to carry out works or a power of entry) which is conferred by or under this Part shall, exept with the consent of the appropriate authority, be exercisable in relation to any land in which there is a Crown or Duchy interest, that is to say, an interest—
A consent given for the purposes of subsection (1) above may be given on such financial and other conditions as the appropriate authority giving the consent may consider appropriate.
Subject to subsection (1) above, the provisions of this Part shall have effect in relation to land in which there is a Crown or Duchy interest as they have effect in relation to land in which there is no such interest.
In this section "the appropriate authority"—
and, if any question arises as to what authority is the appropriate authority in relation to any land, that question shall be referred to the Treasury, whose decision shall be final.
In subsection (4), "relevant person", in relation to any land to which section 90B(5) of the Scotland Act 1998 applies, means the person who manages that land.