i cant imagine they can in anyway specify foreign carrier minimum requirements, but I am sure it would be bought up if said operators were to bend some tin on US soil!
Totally agree on the bending tin point Lowkoon, but they have placed experience limitations on specific carriers in the past.
In theory, a newly trained ex-cadet 777 JFO, with probably less than 500hrs, can be in the right seat on any flight to the US. That's a 3rd of the requirements placed on their own operators, meaning potential political pressure from those operators on their government.