(1) In this Act:
"building work" means—
(a) work in relation to the erection, alteration or demolition of a building, and includes disposal of waste materials generated—
(i) by the alteration of a building other than a building excluded under the regulations; or
(ii) by the demolition of a building (but not part of the building); or
(b) work in relation to repairs of a structural nature to a building.
(2) The regulations may—
(a) exempt a kind of work from the definition of building work ; or
(b) include a kind of work in the definition of building work .