My wife is on an Open Work Permit because I am on a student permit. Her employer is making LMIA for her. My question is: can she go to the border with the US to get her new Closed Work Permit by flagpoling when she gets an LMIA and job offer? Is it necessary to cross the border only by car or can you walk through the border? Does flagpoling cause some trouble in the future for her going to the US? Thank you!