The IMO has adopted amendments to the Anti-Fouling Systems Convention (AFS convention) vide Resolution MEPC 331 (76), which restricts the use of Cybutryne and also includes an operative passage with respect to the issuance of the new AFS certificate

1. IMO adopted amendments to the AFS Convention vide Resolution MEPC 331 (76) to include controls on Cybutryne and an operative paragraph with respect to issuance of the new International Anti-fouling System Certificate. The amendments will enter into force on 1 January 2023.
2. The amendments prohibits application or re-application of anti-fouling systems containing Cybutryne (CAS No. 28159-98-0) on all ships from 1 January 2023.