 Post-completion OPT can start at most 60 days after the completion of studies, and requires the student to work at least 20 hours a week (excluding up to 90 days of unemployment) on topics related to the student's program of study.Post-completion OPT can be at most 12 months long.While doing post-completion OPT, the student is still in F status but cannot engage in arbitrary on-campus employment or enroll in a degree program.