Chapter 16 - Ammunition and Weapons 16-1. References16-2. Authority to use the GPC for Non-Standard Ammunition (NSA) not from Army inventory16-3. Approved Exceptions16-4. Funding Non-Standard Ammunition (NSA)16-5. Explosives, Toxins, and Ammunition Definitions16-6. Approved Exceptions16-7. NSA Exception ProcessParent topic: APPENDIX - EE DEPARTMENT OF THE ARMY GOVERNMENT PURCHASE CARD OPERATING PROCEDURES