Building activities
(1) For the purposes of this Act, the following activities are building activities :
(a) constructing buildings or other structures;
(b) altering the structure of buildings or other structures;
(c) undertaking, constructing or altering earthworks (whether or not in relation to buildings or other structures);
(d) undertaking, constructing or altering engineering works, electrical works or hydraulic works (whether or not in relation to buildings or other structures);
(e) demolishing, destroying, dismantling or removing:
(i) buildings or other structures; or
(ii) earthworks; or
(iii) engineering works; or
(iv) electrical works; or
(v) hydraulic works;
(f) undertaking land clearing;
(g) an activity of a kind prescribed in the regulations.
Structures
(2) For the purposes of this Division, the following are taken to be structures :
(a) bridges;
(b) fences;
(c) towers and pylons;
(d) tents and other temporary structures.
Earthworks or engineering works
(3) For the purposes of this Division, the following are taken to be earthworks or engineering works :
(a) runways, taxiways and aprons;
(b) surface carparks;
(c) retaining walls;
(d) dams;
(e) roads;
(f) railways;
(g) pipelines;
(h) tunnels.