# Building Regulations (Northern Ireland) 2000, Regulation B1: Interpretation

Extent: N.I.
Status: prospective

In this Part—
harmful substances includes fumes and vapours;
materials means any materials whether occurring naturally, recycled or manufactured; and
relevant work means—
(a) the erection of a building;
(b) the structural alteration or extension of a building;
(c) the provision of any service or fitting; or
(d) the backfilling of any excavation carried out in connection with (a), (b) or (c).

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Source: https://www.legislation.gov.uk/nisr/2000/389/regulation/B1 (the official version)
Page: https://openlegislation.uk/building-regulations-northern-ireland-2000/regulation-B1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.