Section 28(7).
SCHEDULE 2S Exemptions from planning permission for certain land uses in 1948
1SWhere on 1st July 1948 land was being temporarily used for a purpose other than the purpose for which it was normally used, planning permission is not required for the resumption of the use of the land for the latter purpose before 8th December 1969.
2SWhere on 1st July 1948 land was normally used for one purpose and was also used on occasions, whether at regular intervals or not, for another purpose, planning permission is not required in respect of the use of the land for that other purpose on similar occasions on or after 8th December 1969 if the land has been used for that other purpose on at least one similar occasion since 1st July 1948 and before the beginning of 1969.
3SWhere land was unoccupied on 1st July 1948, but had before that date been occupied at some time on or after 7th January 1937, planning permission is not required in respect of any use of the land begun before 8th December 1969 for the purpose for which the land was last used before 1st July 1948.
4SNotwithstanding anything in paragraphs 1 to 3, the use of land as a caravan site shall not, by virtue of any of those paragraphs, be treated as a use for which planning permission is not required, unless the land was so used on one occasion at least during the period of 2 years ending with 9th March 1960.