I believe we will eventually see some encrypted inter-police agency talkgroups to avoid what you just described.I can now see an intended use of the "Turn off Encryption" icon on RCMP Harris Dispatch consoles. Last night EPS NW pursued a vehicle into Parkland County. They did a patch to the RCMP on 2776 and the only clear mountie transmission was from NAOCC. All EPS units were in the clear so most likely they could be received by Parkland units. So at least NAOCC could relay messages and communicate with the encrypted RCMP units.
I do know EPS Air 1 has the Edmonton area RCMP talk groups in it's radio and does communicate encrypted with RCMP.
Well I hope so but they already do in the 3000 range of talk groups. In a pursuit they don't want to have to search and change to another group so they patch. As long as the RCMP refuse to share encryption codes with their partners you will have this problem. Another example of this was when the Cross Iron Mills shooting occurred RCMP called in CPS and they patched to Calgary 5 in the clear.I believe we will eventually see some encrypted inter-police agency talkgroups to avoid what you just described.