1. Readmission from contiguous territory 。
2. Readmission after an absence not exceeding 30 days
3. In possession of Form I-94 endorsed to show an unexpired period of initial admission or extension of stay
4. M-1student must also present a properly endorsed SEVIS Form I-20MN (与你们无关)
5. In possession of a valid passport, unless exempt
6. Does not require authorization for admission under the INA 212(d)(3) (与你们无关)
7. Has not applied for a new visa while abroad
8. Has maintained and intends to resume nonimmigrant status
国务院相关规定链接:http://www.cbp.gov/linkhandler/cgov/travel/inspections_carriers_facilities/clp/bulletins/auto_reva.ctt/auto_reva.pdf
目前大部分加勒比海国家对持美国非移民签证的访客无需办理签证(如墨西哥,巴哈马群岛等)。你们选定航线后可逐一在网上再确认一下所到国的签证要求,以保万无一失。如有困难,可再到本坛寻助。