As an F1 PhD student in the United States, I have read this email today, sent to all students of my university:
The Graduate Student Council (GSC) has recently been informed by several individual graduate students that the rules regarding work authorization for summer internships for graduate students have changed this year. We have been told that as a result of this change, F-1 international students can no longer use Curricular Practical Training (CPT) to secure work authorization for summer internships as they have in past years. F-1 international students are being advised to use Optional Practical Training (OPT) to secure summer work authorization instead. We understand that the problem here is that CPT authorization could be secured in approximately 3 weeks in past years, while OPT authorizations takes 2 to 3 months. OPT authorization is therefore not a feasible pathway to get work authorization for internships beginning in June 2016 (about 5 weeks from now).
Why can't F-1 PhD international students no longer use Curricular Practical Training (CPT) to secure work authorization for summer internships, as that used to be able to do so?