My understanding is that’s how it works with most emergency services. The treaty is a formality, but (theoretically, at least) it’s still binding.
Back in the late 70’s - early 80’s a group of ice fishermen were out on lake erie and a big section of ice broke off and sent them drifting on the lake.
Coast Guard rescued them off the ice flow with choppers. One guy had a brand new pick-up truck out there on the ice, they told him they didn’t rescue vehicles.
Long story short... The wind shifted and another guy saw the pick-up go down about 1/2 mile from shore in 8-10 feet of water. The guy got a salvage permit for the truck, hired a boat and diver. The diver filled the cab with inner-tubes, blew them up and they towed the truck to shore.
Turns out the original owners insurance was no good once he drove out on the ice, and the guy with the salvage permit got a brand new pick-up truck free!
To add insult to injury the original owner still had to pay back the loan on the truck.
Never take anything out on the ice you can’t afford to lose.