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20A Exempt buildings
(1) The following buildings are exempt from the operation of the Act:
(a) bridges;
(b) dams;
(c) retaining walls which are associated with bridges, dams or roads;
(d) temporary buildings, other than dwelling places, erected on the site of the construction of bridges, dams or roads if the buildings are to be removed on completion of the work;
(e) stiles;
(f) mesh fences less than 3m in height;
(g) prefabricated bus shelters;
(h) prefabricated playground equipment;
(i) signs associated with roads;
(j) electricity network distribution equipment;
(k) reservoirs
(l) aqueducts;
(m) water and sewage treatment works;
(n) stormwater outfalls.
(2) Poles and masts are exempt from the operation of the Act if they are the property of—
(a) the Territory; or
(b) the Commonwealth; or
(c) a public authority of the Territory or the Commonwealth; or
(d) the provider of an electricity supply or telephone service.