In this section and section 41 of this Act " outline planning permission" means planning permission granted, in accordance with the provisions of a development order, with the reservation for subsequent approval by the local planning authority or the Secretary of State of matters (referred to in this section as "reserved matters") not particularised in the application.
Subject to the provisions of this section, where outline planning permission is granted for development consisting in or including the carrying out of building or other operations, it shall be granted subject to conditions to the following effect—
If outline planning permission is granted without the conditions required by subsection (2) of this section, it shall be deemed to have been granted subject to those conditions.
The authority concerned with the terms of an outline planning permission may, in applying subsection (2) of this section, substitute, or direct that there be substituted, for the periods of three years, five years or two years referred to in that subsection such other periods respectively (whether longer or shorter) as they consider appropriate.
The said authority may, in applying the said subsection, specify, or direct that there be specified, separate periods under paragraph (a) of the subsection in relation to separate parts of the development to which the planning permission relates; and, if they do so, the condition required by paragraph (b) of the subsection shall then be framed correspondingly by reference to those parts, instead of by reference to the development as a whole.
In considering whether to exercise their powers under subsections (4) and (5) of this section, the said authority shall have regard to the provisions of the development plan and to any other material considerations.