The government has licensed a Canadian company irrespective of who the owner is. I've worked five years under complete U.S. ownership as a Canadian citizen operating MDA. The government has licensed a Canadian company, and I can assure you they're not moving the licence to any U.S. company. It's still a Canadian company, operated by exactly the same people who operate it today. The company is owned by a U.S. company, but it operates under Canadian law--it can't do anything else.
On April 1st, 2008. See this statement in context.