An office development permit in respect of any development may be issued subject to such restrictions on the making of an application for planning permission for that development (whether as to the period within which, or the persons by whom, such an application may be made, or otherwise) as the Secretary of State considers appropriate in the exercise of his discretion as mentioned in section 74(3) of this Act; and, where an office development permit in respect of any development is issued subject to any such restrictions, and an application for planning permission for that development is made which does not comply with those restrictions, these provisions shall apply in relation to that application as if no such permit had been issued.
Without prejudice to subsection (1) of this section, an office development permit may be issued either unconditionally or subject to such conditions as the Secretary of State considers appropriate in the exercise of his discretion as mentioned in section 74(3) of this Act; and any reference in these provisions to conditions attached to an office development permit is a reference to conditions subject to which such a permit is issued.
In so far as any of the conditions attached to an office development permit are of such a description that (apart from this section) they could not have been imposed under this Act, this Act shall apply in relation to any application for planning permission for the purposes of which that permit is required, and to any planning permission granted on such an application, as if the powers conferred by this Act included power to impose conditions of that description.
Where conditions are attached to an office development permit, and, on an application for planning permission for the purposes of which that permit is required, planning permission is granted, the authority granting the permission shall grant it subject to those conditions, with or without other conditions.
Planning permission to which subsection (4) of this section applies shall not be invalid by reason only that the requirements of that subsection are not complied with; but where any such planning permission is granted without complying with the requirements of that subsection the planning permission shall be deemed to have been granted subject to lie conditions attached to the office development permit, or (if any other conditions were imposed by the authority granting the permission) to have been granted subject to the conditions attached to the permit in addition to the other conditions.