In this Division—
"essential safety measure" means—
(a) any of the following items required by these Regulations to be provided in relation to a building or a place of public entertainment—
(i) an item listed in Tables I1.1 to I1.11 of Volume 1 of the BCA, except the item in Table I1.4 relating to artificial lighting;
(ii) a mechanical ventilation system or a hot water, warm water or cooling water system in a building, other than a system only serving a single sole occupancy unit in a Class 2 or 3 building or a Class 4 part of a building; or
(b) any other item that is required by or under the Act or these Regulations to be provided in relation to a building or place of public entertainment for the safety of persons in the event of fire and that is designated by the relevant building surveyor as an essential safety measure; or
(c) any other item that is an essential service within the meaning of Division 1 of Part 11 of the Building Regulations 1994 as in force before their revocation;
"maintenance determination" means a determination made by a relevant building surveyor under regulation 1204 or regulation 11.4 of the Building Regulations 1994 as in force before their revocation.