Chapter 1 - The Government Purchase Card Program 1-1. Overview1-2. GPC Uses1-3. Information and Waiver Process1-4. Task Order and Period of Performance1-5. GPC Authority1-6. Applicability1-7. Micro-purchase Thresholds (MPT)1-8. GPC Delegations of Authority and Appointment LettersParent topic: APPENDIX - EE DEPARTMENT OF THE ARMY GOVERNMENT PURCHASE CARD OPERATING PROCEDURES