There's not really a perfect answer to this, so I'm just sharing and spitballing my imperfect ideas to see if anyone with some sense can build off of them.
Could do a prompt similar to when you're being ziptied or searched which allows you to choose whether you want to be revived or not. But that may kinda defeat the purpose, depending on who you ask.
I feel like allowing police and fire to use CPR just makes sense. For regular civilians, I'd implement a paid training course that can be accessed at the hospital. Once completed, you can use CPR with limited effectiveness (compared to emergency services.)
This is also a pretty good idea, if...
Hey y'all, just getting back into the serious RP scene and this seems like a good place to be. Happy to be here, and thanks to everyone on the server that's made it great so far.