3In section 17(2) (certification of appropriate alternative development), for “the authority proposing to acquire the interest have served a notice to treat in respect thereof, or an agreement has been made for the sale thereof to that authority” there is substituted “an order under section 19(1) of the Regional Development Agencies Act 1998 vesting the land in which the interest subsists in a regional development agency has come into force, or an agreement has been made for the sale of the interest to such an agency”.