not necessary.+ u1 y! l& _# o9 W1 ^2 C; p( x
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. 1 F/ h* g+ s# ^7 O( U
# J% o0 ~# z" l% H; Zyou need valid visa and utility bill that indicate you are living in USA. 5 l# w! D: Z2 c( U