The TLDR of the opinion is that they held the BATFE acted outside of statutory authority, acting as the legislature making new law with the administrative policy.
So they can approve the sales, but can't take it back?
They were found to not be machine guns per the statutory definition. So they can't arrest people for having one (unless a new law is passed). Prior to the BATFE's policy change they didn't 'approve the sales' more so they didn't bar the sales.
The TLDR of the opinion is that they held the BATFE acted outside of statutory authority, acting as the legislature making new law with the administrative policy.
So they can approve the sales, but can't take it back?
They were found to not be machine guns per the statutory definition. So they can't arrest people for having one (unless a new law is passed). Prior to the BATFE's policy change they didn't 'approve the sales' more so they didn't bar the sales.