4.—(1) The amendment made by regulation 2 does not apply where—
(a)building work on a particular building has been commenced prior to 29 March 2023 in accordance with any relevant notification provision,
(b)a relevant notification provision has been complied with in relation to proposed building work on an individual building prior to 29 March 2023 and the building work has commenced within 12 months beginning with 29 March 2023, or
(c)a relevant notification provision has been complied with before 31 July 2014 and building work has commenced before 31 July 2015 in accordance with the relevant notification provision.
(2) In this regulation, “relevant notification provision” means regulation 12(2) of the Building Regulations 2010 and sections 47(1), 50, 51A(2) and 54 of the Building Act 1984.