Ok let me put it another way, lets say the op has ground passed for a .22 rimfire (hypothetically of course) are you saying that his ground is also passed for .22 rimfire magnum? or potentially the new .22 wsm when it arrives? it is certainly the case that ground passed for .22 is not automatically passed for .17 rimfire, so would he not be in contravention if he bought a magnum and used it on ground passed only for the .22 lr? I totally see where you are coming from Deker really I do, and I accept 100% that the mistake would be on the part of the police, however I am trying to stop the op and anyone else for that matter causing themselves a load of grief, irrespective of who has made the mistake, this is a grey area, and could open a can of worms in future.
If the ground is passed for .22 RIMFIRE then it is passed for .22WMR because that is a .22 Rimfire. If the ground is passed for .22LR then it is passed for .22lr, and .22lr is not .22WMR. .22RF is not a .17 in any way, confirmation would need to be secured for any .17 use of land cleared for .22RF.
Lets not start second guessing any other calibre we don't have yet, and I'm not aware of a .22WSM, is that yet another, we haven't even got the 17WSM yet!
I hear what you are saying and I think it likely the region meant LR, the fact is they didn't say that, they said .22 RF, that includes WMR.
Shocking and appalling wording on the part of the region if that is what they meant!