(3) A building, other than a Class 1 building, must have installed throughout the building either one or both of the following as required by Specification E2.2a of the BCA Volume One— (a) a smoke alarm system that complies with clause 3 of Specification E2.2a of the BCA Volume One; (b) a smoke detection system that complies with clause 4 of Specification E2.2a of the BCA Volume One. (4) This regulation must be complied with by— (a) in the case of a soleoccupancy unit contained in a Class 2 building, the owner of the soleoccupancy unit; or (b) in any other case, the owner of the building. (5) Subregulation (3) does not apply to a building in which there is installed throughout the building an approved smoke detection and alarm system that consists of either one or both of the following— (a) an approved smoke alarm system powered from a mains electricity supply; (b) an approved smoke detection system. (6) This regulation does not apply to a Class 1a or Class 4 part of a building or a soleoccupancy unit contained in a Class 2 building that complies with regulation 707 of the Building Interim Regulations 2017 as in force immediately before its revocation.
(3) A building, other than a Class 1 building, must have installed throughout the building either one or both of the following as required by Specification E2.2a of the BCA Volume One— (a) a smoke alarm system that complies with clause 3 of Specification E2.2a of the BCA Volume One; (b) a smoke detection system that complies with clause 4 of Specification E2.2a of the BCA Volume One. (4) This regulation must be complied with by— (a) in the case of a soleoccupancy unit contained in a Class 2 building, the owner of the soleoccupancy unit; or (b) in any other case, the owner of the building. (5) Subregulation (3) does not apply to a building in which there is installed throughout the building an approved smoke detection and alarm system that consists of either one or both of the following— (a) an approved smoke alarm system powered from a mains electricity supply; (b) an approved smoke detection system. (6) This regulation does not apply to a Class 1a or Class 4 part of a building or a soleoccupancy unit contained in a Class 2 building that complies with regulation 707 of the Building Interim Regulations 2017 as in force immediately before its revocation.