Hello everyone! My 19 year old son is in Canadá as a tourist. He's loving the experience. He's staying with family and he knows that he has to leave Canada before 6 months, but he would like to return. Is he able to enter Canadá again after being in Portugal for 2 or 3 weeks? Can he enter Canadá as many times as he wants? He has a valid passort and eTA. Thanks!