留学生维持身份清单：入境30天内联系学校DSO、每学期修满全程课业、无授权不得打工
美国国土安全部 Study in the States 官方项目重申 F 与 M 学生维持身份的基本要求：学生入境不得早于课程开课前30天，入境后要立即联系学校指定校方代表（DSO），最迟在 I-20 表格上的开课日期前到校联系 DSO。
在读期间，学生必须上全部课程、保持正常学业进度，每个学期修满全程课业（full course of study）；想退课先跟 DSO 谈，觉得读不完要在 I-20 截止日期之前向 DSO 申请延期课程。F-1 学生须先完成至少一个完整学年，才有资格放年假。
打工与实习必须先有授权：没有授权就工作，会被要求立即离境，日后还可能无法再入境。课程结束后，F 学生有60天宽限期离境或办理转学、升读或转换身份，M 学生为30天。换专业、转学、搬家、休学、出境旅行与申请延期这六类动作，动手之前都要先找 DSO。（来源：美国国土安全部 Study in the States）
Maintaining Student Status: Contact Your DSO Within 30 Days of Arrival, Keep a Full Course Load, and Never Work Without Authorization
Study in the States, the U.S. Department of Homeland Security's official program for international students, restates the basic rules for maintaining F and M status: students may enter the United States no more than 30 days before their program begins, must contact their designated school official (DSO) immediately upon entry, and must check in again no later than the program start date listed on the Form I-20.
While studying, students must attend all classes, maintain normal academic progress, and pursue a full course of study each term. Talk to the DSO before dropping a class, and request a program extension before the I-20 end date if more time is needed. F-1 students become eligible for annual vacation only after completing one full academic year.
Employment and practical training require authorization first: working without authorization means being forced to leave the United States immediately and possibly being unable to re-enter. After completing a program, F students have 60 days to depart or arrange a transfer, a new education level, or a change of status; M students have 30 days. Changing a major, transferring, moving, taking leave, traveling abroad, or requesting an extension all start with a conversation with the DSO. (Source: Study in the States, U.S. Department of Homeland Security)
来源：美国国土安全部 Study in the States
发布：GSM·美国（发布链接）
图片来源：图片来源：Wikimedia Commons「Three walking students, Tulane University New Orleans」（Tulane Public Relations 摄，CC BY 2.0），图中为 Tulane 大学校园里的学生 Image: Wikimedia Commons "Three walking students, Tulane University New Orleans" (by Tulane Public Relations, CC BY 2.0)
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