What type of policies govern the Services career field?

The Services career field is primarily governed by Air Force Instructions (AFIs) and applicable regulations. AFIs are official documents that provide guidance and instructions necessary for the effective operation within the Air Force. They outline procedures, responsibilities, and standards specific to various aspects of Air Force operations, including those relevant to Services personnel.

These policies ensure that members of the Services career field follow established protocols and maintain consistency in their operations, which supports overall mission effectiveness. AFIs cover a wide range of topics important to the Services career field, ensuring that personnel are adequately equipped to perform their duties in alignment with Air Force goals and regulations.

While the other options mention directives and protocols related to broader military or aviation contexts, they do not specifically target the operational policies governing the Services field. Thus, AFIs and the applicable regulations are the most relevant and directly applicable to the duties and responsibilities of the Services professionals within the Air Force.