# Town and Country Planning Act 1971, Paragraph 12


Subsection (1) of section 23 of this Act applies (subject to the provisions of that section) to the carrying out of development whether before or after the commencement of this Act, except that it does not apply to development carried out on or before the appointed day.

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Source: https://www.legislation.gov.uk/ukpga/1971/78/schedule/24/paragraph/12 (the official version)
Page: https://openlegislation.uk/town-and-country-planning-act-1971/schedule-24/paragraph-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.