美本的福音么？

The proposal would increase the OPT extension period for STEM OPT students from the 2008 IFR’s 17 months to 24 months. The proposal would also make F-1 students who subsequently enroll in a new academic program and earn another qualifying STEM degree at a higher
educational level eligible for one additional 24-month STEM OPT extension.

这个subsequently，是指必须是本科结束的时候用了opt?如果本科毕业直接读研，那么其实还是一个opt extension？