Transitional provision
21.—(1) The amendments made by Parts 2 and 3 of these Regulations do not apply in a case where—
(a)building work on a particular building has been commenced prior to the day these Regulations come into force in accordance with any relevant notification provision, or
(b)a relevant notification provision has been complied with in relation to proposed building work on an individual building and the building work has commenced within 12 months beginning with the day these Regulations come into force.
(2) In this regulation, “relevant notification provision” means regulation 12(2) of the Building Regulations and sections 47(1), 50, 51A(2) and 54 of the Building Act 1984.