"No enforcement notice shall be issued under section 172 in respect of development carried out by or on behalf of the Crown after July 1, 1948 on land which was Crown land at the time when the development was carried out."
"Section 294(1) in practice confers immunity on the development carried out because it was development carried out on behalf of the Crown (ie by [the Ministry])..."
"The modern rule of construction of statutes is that the Crown, which today personifies the executive government of the country and is also a party to all legislation, is not bound by a statute which imposes obligations or restraints on persons or in respect of property unless the statute says so expressly or by necessary implication."
"Subsection (3) is concerned with land which was Crown land at a time when development was carried out on it by or on behalf of the Crown, but which has ceased to be such land. Ex hypothesi the development would have been carried out without planning permission, and but for this provision the Crown's successor in title would be subject to an enforcement notice requiring him to undo the development."
"These provisions, read as a whole [in other words the provisions of section 253 of the 1972 Act], make it clear that the whole Act proceeds on the assumption that the Crown is not subject to any requirement of planning permission for development carried out by it. It is true that the ordinary contemplation is that any development carried out by the Crown would be carried out on Crown land. It may be doubted whether Parliament could ever have envisaged that the Crown might carry out development anywhere but on Crown land. There would be no need for the Crown to seek planning permission for development on land which it was proposing to acquire in the future, because once it had acquired the land it could carry out the development without planning permission. So I do not consider that there can be any question of a Parliamentary intention that the Crown should be subject to the requirements of planning control in relation to land other than Crown land."
"Since the Crown is not subject to planning legislation any use of land which it institutes is a lawful use and can be continued without risk of enforcement."
"Since the Crown is not subject to planning legislation, any use of land which it institutes is a lawful use and, subject to what is said in paragraph 1 of Part II of this memorandum, can be continued by a third party, eg a purchaser of land or the freeholder of land of which the Crown is a lessee, without risk of enforcement."
"Notwithstanding any interest of the Crown in Crown land, but subject to the following provisions of this section - (c) any restrictions or powers imposed or conferred by... Part VII [in which section 172(1) is to be found]... shall apply and be exercisable in relation to Crown land, to the extent of any interest in it for the time being held otherwise than by or on behalf of the Crown."