回复：OPT 急问, 请各位多指教, 是否out of status？

For an F-1 student, she should enroll fulltime for every semester (except the summer break and except leave or reduced course load pre-approved by international center) before she graduates. If this OPT is approved for work before graduation, she needs to enroll all the time before she graduates.

Even for an American student, this US citizen needs to register in fall in order to give oral defense during the semester.