UNODC Early Warning System announced, on 17th May 2016, that the Commission on Narcotic Drugs – in its 59th Session from 16 to 22 March 2016 – decided that acetylfentanyl (Schedule I and IV) and MT-45 (Schedule I) will be added to the Single Convention on Narcotic Drugs of 1961, as amended by the 1972 Protocol.
For more information check the links below:
https://www.unodc.org/LSS/Announcement/Details/3ec66e50-249f-438e-8a79-470d5e269b8d