Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:5:p7
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 5 (pt 7/7)
Character Range: 1029467–1030533

should be applied as follows:
    * categories 1, 2A and 2B should be treated as carcinogens
    * category 3 substances can only be treated as non-carcinogens, given the paucity of information, but it should be recognised that this classification does not mean cancer is ruled out and it is subject to change
    * category 4 should be treated as non-carcinogens.
In some circumstances, a chemical may have a carcinogenic classification but lack toxicity criteria to assess the cancer risk. In these circumstances, it is recommended that the chemical be assessed using a threshold approach (that is, ignoring the cancer risk) in modelling. The possibility of cancer effects should be identified and evaluated, even though a numerical expression of risk cannot be derived.

Table 5. IARC classification for carcinogens
Group                                                                                                                                                                                                                                      Description