60Permission granted by development order
(1)Planning permission granted by a development order may be granted either unconditionally or subject to such conditions or limitations as may be specified in the order.
(2)Without prejudice to the generality of subsection (1), where planning permission is granted by a development order for the erection, extension or alteration of any buildings, the order may require the approval of the local planning authority to be obtained with respect to the design or external appearance of the buildings.
(3)Without prejudice to the generality of subsection (1), where planning permission is granted by a development order for development of a specified class, the order may enable the Secretary of State or the local planning authority to direct that the permission shall not apply either—
(a)in relation to development in a particular area, or
(b)in relation to any particular development.
(4)Any provision of a development order by which permission is granted for the use of land for any purpose on a limited number of days in a period specified in that provision shall (without prejudice to the generality of references in this Act to limitations) be taken to be a provision granting permission for the use of land for any purpose subject to the limitation that the land shall not be used for any one purpose in pursuance of that provision on more than that number of days in that period.