See Comment 1) to table 2-7:

Diluent type B may always be replaced by diluent type A. Boiling point diluent type B should be at least 60°C higher than the SADT of the organic peroxide.

Remark from BAM: in the technical provisions of the ICAO, this peroxide is in contrast to the UN Model Regulations (diluent type B there) with the entry Type A diluent. However, because footnote 25, which refers to diluent type B, and the UN Recommendations also state type B, it is assumed that diluent type B is meant here.