Businesses involved in the the following industries (as defined by the SIC Codes 2007) can use the ProQuin product as defined in the table below.
| Options |
 |
 |
 |
| 35 Electricity, gas, steam and air conditioning supply |  |  |  |
| 35.1 Electric power generation, transmission and distribution |  |  |  |
| 35.11 Production of electricity |  |  |  |
| 35.12 Transmission of electricity |  |  |  |
| 35.13 Distribution of electricity |  |  |  |
| 35.14 Trade of electricity |  |  |  |
| 35.2 Manufacture of gas; distribution of gaseous fuels through mains |  |  |  |
| 35.21 Manufacture of gas |  |  |  |
| 35.22 Distribution of gaseous fuels through mains |  |  |  |
| 35.23 Trade of gas through mains |  |  |  |
| 35.3 Steam and air conditioning supply |  |  |  |
| 35.30 Steam and air conditioning supply |  |  |  |