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Due to an April 1, 2002 change in regulations, applicants will only be able to re-enter the United States if they are found eligible for a new visa and actually have the visa stamped in their passport. I-94 forms (even if valid), accompanied by previous expired visas, will no longer be valid for the automatic re-entry of persons from Canada or Mexico if during their visit they applied for a new visa that has not, in fact, been issued.
上述是在加拿大第三国签证预约网站上的通知,意思好象是,如果没有新的签证,即使持有效I-94卡,也不能自动重新自加拿大或墨西哥入境美国,这和以前贴子上讨论不一样.