1.—(1) Subject to sub-paragraph (2), a physical feature, in relation to a building situated in Northern Ireland, satisfies the relevant design standard for the purposes of regulation 12(2) where it accords with Technical Booklet R and Technical Booklet V: 2000.
(2) However, a physical feature does not satisfy the relevant design standard where more than 10 years have elapsed since—
(a)the day on which the construction or installation of the feature was completed; or
(b)in the case of a physical feature provided as part of a larger building project, the day on which the works in relation to that project were completed.