In respect of marine fish farming, the passing of the Town and Country Planning (Prescribed Date) (Scotland) Amendment Regulations 2010, effective from 31 March 2010, means that, in the absence of any prior grant or refusal of planning permission under section 31A of the Town and Country Planning (Scotland) Act 1997, the earliest date on which planning permission would be required for the operation of a marine fish farm using equipment placed or assembled before 1 April 2007 is now 31 March 2013.