For Part 61 training:
Part 61 flight schools and independent flight instructors may train a foreign national if that alien is a legal permanent resident or in a work status (H-type visa) with extended stay privileges or a refugee in asylum status with appropriate DHS documentation. They also may train a foreign national on an F-1 (academic visa) provided that the student is still enrolled and attending the college or university as shown on the F-1 and the student has notified SEVIS of the additional training being received at a non-SEVIS approved school.
For instance: college students or those here for temporary employment.