Final answer:
Designation of GPC holders and approving officials as outlined in AFI 64-117 is the responsibility of commanders or organization heads, who must ensure appropriate training and awareness of responsibilities within the Government Purchase Card program to ensure proper oversight and accountability.
Step-by-step explanation:
The Government Purchase Card (GPC) program is governed by Air Force Instruction (AFI) 64-117, which establishes the guidelines for managing the program within the US Air Force. According to AFI 64-117, the responsibility for designating GPC holders and approving officials lies with the commanders or heads of the organization. These commanders or heads must ensure that GPC holders and approving officials are adequately trained and are aware of their responsibilities in accordance with the GPC program.
The designation of GPC holders and approving officials is a critical step in ensuring proper oversight and accountability of government funds. The process typically involves assessing the trustworthiness and reliability of individuals who will have access to government credit resources, and ensuring that there are appropriate checks and balances in place.