I dont think it is confusing at all,here is the wording on my ticket
The .22rf rifle ,sound moderator and ammunition shall be used for shooting vermin and ground game and for zeroing on ranges.
The .17hmr rifle ,sound moderator and ammunition shall be used for shooting vermin and foxes and for zeroing on ranges.
It seems to be luck of the draw as to the force you have your ticket under.
Personally the 17hmr used at the right distances is fine for shooting foxes,but if your force will not let you take foxes with 17hmr take the opportunity and go centrefire if that is what they are