ITAR raises it's ugly little head wherever the manufacturer is owned by US registered company, irrespective of location or indeed history; when Smiths were bought up by GE there were difficulties over the supply of British manufactured/designed components urgently needed for an operational airframe until the requests could be presented to the appropriate Senate committee.
Sovereignty went out with the introduction of 'The Market Place' (and perhaps some outrageously unfair protectionist policies from our 'special' friends across the water)