in settings where framed art is hung in places that lots of people will pass through it’s pretty common to use a special type of locking mount that makes it non-trivial to remove both for the safety of those in the space and to prevent it being taken. this type of security hardware is a lot more frequent than you realize but it’s almost impossible to tell even if you look from the side.
chances are, the nominator won’t know either so it’s unlikely to ever be mentioned in the supporting text.
personally if the artwork does not appear to be part of a rotating installation and/or fits with the theme of the establishment or has some other connection to where it’s located I tend to approve these. it’s fairly common for such artwork to hang on the same wall for years