DHS grants STEM OPT extensions to eligible F-1 students who are currently in a period of post-completion OPT once per degree level (i.e., bachelor's, master's or doctorate). A student may participate twice in the STEM OPT extension over the course of their academic career. Students may not apply for STEM OPT extensions during the 60-day grace period following an initial (usually 12-month) period of post-completion OPT.