It does surprise me that with many phone calls being generated with voip, that the origin of the voice can not be accurately determined. Maybe this surprises me since I don't know all the details how it works?
With land line phones, the signal comes from a well defined place and goes straight to the phone company, and then to another place, and I bet it is easy to trace. Just a guess.
And with the out of country calls, wouldn't it be easier to identify these, since after all, the amount of overseas calls is probably a lot lower than calls within the USA?
So with that said, this can't be a new issue, tracing true origin of phone calls. And I would bet some agency has at least partly solved it and made a magic thing/ program to do it.
Nice to have a bill signed into law, but it won't matter unless someone publicly uses the magic trace tools.
But I wish they would do something. I have had several scam robocalls.