Universal precautions are used any time any one of my people go to a residence. I try to get to as many domestic disturbances as I can, because I find that the presence of a supervisor there, someone of senior rank, tends to help people out. And to the best of my knowledge, I know of no front-line police officer in Saskatoon who queries the registry en route to a call. It's just not anything that happens. Their first priority is to get there. They use precautions in approaching a residence.
As for a hit on that registry, if they were to query that registry and they were to believe the information saying there were no firearms there, they would be placing themselves at great jeopardy in proceeding further if they didn't take precautions in approaching that residence. If you go there with the thought process in mind that there are no firearms there--that's what I've tried to convey--you're putting yourself at risk. You are doomed to some kind of terrible tragedy.
We take every precaution. Once we find there's a firearm there, or if we have any indication there are firearms there, we seek to cordon off the area to secure it so that we can bring in qualified people, people from our emergency response team, who have the tools and the ability to deal with armed or barricaded individuals.