31.—(1) Where before 6th April 2006—
(a)a contract is entered into for the provision of building work in respect of which regulation 12 (giving of a building notice or deposit of plans) of the Building Regulations does not require the deposit of full plans; and
(b)that work has not commenced,
the Building Regulations shall continue to apply to that work as if these Regulations, other than the amendments made by regulations 10(c), 13, 21 and 22, had not been made, provided that the work is commenced before 1st October 2006.