It can't be formally "adopted" but it can be imposed by regulation and EO in a second kenyan term with 5 Justices on the Court, including Chief Justice Earl W John Roberts to back it all up.
The UN Arms Trade Treaty that has been identified by observers as a flagrant threat to the second amendment and which Barack Obama is determined to sign...............Former US Ambassador to the UN John Bolton also warns that the agreement “is trying to act as though this is really just a treaty about international arms trade between nation states, but there is no doubt that the real agenda here is domestic firearms control.”
http://beforeitsnews.com/story/2398/843