23Section 55(1) of this Act does not apply to any works executed or caused to be executed before 1st January 1969.
24(1)Where, before 1st January 1969, consent under a building preservation order was given, either by the local planning authority or by the Minister on appeal, for the execution of any works, the consent shall operate in respect of. those works as listed building consent, subject to the same conditions (if any) as were attached to the consent under the building preservation order.
(2)In the case of demolition works for which consent was given under a building preservation order compliance with section 55(2)(b) of this Act shall not be required.