| (a) | Cleaning of the exterior of any building or facility, including the roof, exterior walls, facade or windows. |
| (b) | Cleaning of any amusement ride that is erected in any open space. |
| (c) | Cleaning of any gas installation, gas pipeline, petroleum pipeline or pipeline for conveying flammable material. |
| (d) | Cleaning of any water installation, water service installation, water pipe, water storage tank, drain, sewerage system or storm water drainage system. |
| (e) | Cleaning of any electric line, electrical installation, electrical plant, electrical system or electricity system within the meaning of section 2 of the Electricity Act (Cap. 89A) or any telecommunication cable within the definition of section 2 of the Telecommunications Act (Cap. 323). |
| (f) | Cleaning of any submarine cable or submarine pipeline. |
| (g) | Cleaning of any exhaust duct or air duct. |
| (h) | Cleaning at any construction site or other site where construction, maintenance, retrofitting, repair or removal of a building or an infrastructure is taking place or has taken place. |
| (i) | Cleaning of any laboratory, clean room or other facility with highly controlled environmental conditions of sterility. |
| (j) | Cleaning of any premises or area containing —| (i) | hazardous substance within the meaning of section 2 of the Environmental Protection and Management Act (Cap. 94A); | | (ii) | toxic industrial waste; | | (iii) | biological agents or toxins within the meaning of section 2 of the Biological Agents and Toxins Act (Cap. 24A); or | | (iv) | radioactive material or radioactive waste within the meaning of section 2 of the Radiation Protection Act (Cap. 262). |
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| (k) | Cleaning of any animal enclosure, cage or compound. |
| (l) | Cleaning of any tank or aquarium used for keeping live fish or aquatic life and used otherwise than for aquaculture. |
| (m) | Cleaning of any hydrotherapy pool, physiotherapy pool, swimming pool, jacuzzi or spa. |
| (n) | Cleaning (whether on a full‑time or part‑time basis) of any premises occupied as a private residence (but not including any common property of any condominium). |