Your attorney is correct - 回复：请问，H1-B去Mexico用不用有效签证啊？律师说30天内不用，但

30-day policy applies to both Canada and Mexico

http://web.wenxuecity.com/BBSView.php?SubID=immigration&MsgID=377042

所有跟帖： 

• 谢谢回答。难道墨西哥签证材料上valid visa refers to valid I-94? -notimpossi- ♀ (0 bytes) () 10/17/2007 postreply 11:50:57