71.—(1) An order under sub-paragraph (a) of paragraph (1) of Article 69 may enable those exercising any power conferred by the order to exercise it retrospectively (whether or not the power could otherwise be so exercised) and an order under sub-paragraph (b) of that paragaph may modify a scheme retrospectively.
(2) Any modification of a scheme made in pursuance of an order of the Authority under Article 69 is as effective in law as if it had been made under powers conferred by or under the scheme.
(3) An order under Article 69 may be made and complied with in relation to a scheme—
(a)in spite of any enactment or rule of law, or any rule of the scheme, which would otherwise operate to prevent the modification being made, or
(b)without regard to any such enactment, rule of law or rule of the scheme as would otherwise require, or might otherwise be taken to require, the implementation of any procedure or the obtaining of any consent, with a view to the making of the modification.
(4) In this Article, “retrospectively” means with effect from a date before that on which the power is exercised or, as the case may be, the order is made.