Fairly certain all those have "acts of congress" attached to them. I mean, it used to take a constitutional amendment to make something illegal but now we have tons of agencies responsible for regulating all the things.
Plus, they're relying on the "math is a weapon" law to ban "export" of the models.
It has never taken a constitutional amendment to make something illegal.
Congress passed the Arms Export Control Act (22 USC 2778) in the Ford administration and it has been applied to software since at least the Clinton administration.