Warrant officers in the following categories are not subject to this chapter:

((1)) Reserve warrant officers—

((A)) on active duty as authorized under section 115(a)(1)(B) or 115(b)(1) of this title, or excluded from counting for active duty end strengths under ; or

((B)) on full-time National Guard duty.

((2)) Retired warrant officers on active duty (other than retired warrant officers who were recalled to active duty before , and have served continuously on active duty since that date).

((3)) Students enrolled in the Army Physician’s Assistant Program.