not necessary.4 @( I/ w8 U2 p; F7 c% W9 L
legally, you may use Canadian driving license for 3 months. but usually, if you stay for less than one year. nobody go for change it. % B7 x/ J. N/ B' O2 g" L5 N5 M; S* x
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you need valid visa and utility bill that indicate you are living in USA.' D& z1 i, A% n+ y% y7 A( w% ^" s