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.