10.—(1) The amendments made by regulation 4 (in respect of the new regulation 21(4)(c) which it introduces to the Building Regulations 2010), regulation 6 and regulation 8 (in respect of the new regulation 28(2) which it introduces to the Building Regulations 2010) do not apply in any case where on the date these Regulations come into force—
(a)building work has started in accordance with any relevant notification provision; or
(b)a relevant notification provision has been complied with in relation to proposed building work and the building work is started within the period of twelve months beginning on the day these Regulations come into force.
(2) In this regulation, “relevant notification provision” (“darpariaeth hysbysu berthnasol”) means regulation 12(2) of the Building Regulations 2010 and sections 47(1), 50, 51A(2) and 54 of the Building Act 1984.