Order bringing section 20(3) of the Planning etc. (Scotland) Act 2006 into force on 1st December 2011 and also commences the provisions of section 56 of and the schedule to the Act on that date to the extent that they repeal certain provisions of the Planning (Listed Buildings and Conservation Areas) (Scotland) Act 1997 specified in the schedule.

OPSI, 1 November 2011 

http://www.legislation.gov.uk/ssi/2011/382/contents/made