With the irony being that the only ever country to use nuclear weapons is enforcing something on the only ever country to receive those weapons, in the name of nuclear weapon control.
Manufacturers of ITAR controlled devices typically have to enforce compliance by their customers. If there's a method to enforce compliance and it isn't present, the manufacturer can be held responsible for the export. Some things (such as mirrors for lasers) can't really be enforced while others (large machines, aircraft) can be.
"US arms export regulations force CNC manufacturers to implement anti-relocation lockout mechanisms"
Of course it's not just the manufacturers being dicks; they implement that or they can't import to the USA.