Division 3.2.2.2.7 F1

The tiered approach provides guidance on how to organize existing information on a substance and to make a weight of evidence decision about hazard assessment and hazard classification.

Although information might be gained from the evaluation of single parameters within a tier (see Section 3.2.2.2.1.), consideration shall be given to the totality of existing information and making an overall weight of evidence determination. This is especially true when there is conflict in information available on some parameters.