http://www.legislation.gov.uk/asc/2026/5/section/113/enactedBuilding Safety (Wales) Act 2026enKing's Printer of Acts of Parliament2026-05-20 PART 4REMEDIATION OF CERTAIN DEFECTSMeaning of “relevant defect” 113 1 In this Part— “relevant defect” (“diffyg perthnasol”), in relation to a relevant building, means a defect as regards the building that— arises as a result of anything done or not done (including anything done or not done in the provision of professional services), or anything used or not used, in connection with relevant works, and creates a building safety risk or significantly increases an existing building safety risk; “relevant step” (“cam perthnasol”), in relation to a relevant defect, means a step that has as its purpose— preventing or reducing the likelihood of a fire or collapse of the building (or any part of it) occurring as a result of the relevant defect, reducing the severity of any such incident, or preventing or reducing harm to people in or about the building that could result from such an incident. 2 In this section— “building safety risk” (“risg diogelwch adeilad”) means a risk to the safety of people in or about the building arising from— the spread of fire, or the collapse of the building or any part of it; “conversion” (“trosi”) means the conversion of the building for use (wholly or partly) for residential purposes; “landlord or management company” (“landlord neu gwmni rheoli”) means a landlord under a lease of the building or any part of it, or any person who is a party to such a lease otherwise than as landlord or tenant; “the relevant period” (“y cyfnod perthnasol”) means the period beginning with 28 June 1992 and ending with 20 February 2026; “relevant works” (“gwaith perthnasol”) means any of the following— works relating to the construction or conversion of the building, if the construction or conversion was completed in the relevant period; works undertaken or commissioned by or on behalf of a landlord or management company, if the works were completed in the relevant period; works undertaken after the end of the relevant period to remedy a relevant defect (including a defect that is a relevant defect by virtue of this paragraph).