Commentary on Sections Part 3: Planning Control. Section 32: Development orders
The Department must make a development order stating the types of development which by virtue of the order are granted planning permission and those for which permission must be applied for. The grant of permission can include permission with conditions if necessary.  In the case of permitted development, a council and Department will have the power to direct in relation to a particular case or area of land that the permission which would otherwise be granted by the order does not apply, and an application must be made.