Yes, again, I didn't do this research, but my understanding is that there is some ambiguity that has legal implications, but when you look at the weapons that are of greatest concern, at least from my viewpoint, it has less to do with legal procedures and more to do with law enforcement capacity and border monitoring and, eventually, when this conflict is resolved, disposing properly of the surplus small arms, light weapons, and munitions that are available in large quantities in Ukraine.
On October 18th, 2017. See this statement in context.