IANA AI researcher, but there are different technique for fingerprinting or assessing the similarity of different LLM models. Or it could become known via a leak, or good old humint.
If it wanted to, the US could make model inspection (with direct access to the weights) a condition of access to their market.
Notably, I believe the Cessna stall parachute in certain planes is autonomous by most definitions, not the least of which because it fires without pilot input and because it takes control of the plane away from the human to do so. I recognize this is a rather, uh, odd use of ‘autonomous’ — but it does technically serve as a pilotless emergency landing mechanism :)
What jury? The payment happened before the trial: "five days before a trial was scheduled to begin in the case, Dallas County officials agreed to pay $600,000 to settle the case".