The specialty training standard (STS) serves as a contract between which major command (MAJCOM) and the functional user?

The specialty training standard (STS) is a critical document that outlines the training requirements and expectations for personnel in specific Air Force specialties. In this context, the STS serves as a contract primarily between the Air Education and Training Command (AETC) and the functional user. AETC is responsible for the training and education of Air Force members, ensuring they receive the necessary skills and knowledge for their roles.

This relationship highlights AETC's role in developing training programs that adhere to the requirements set out in the STS. By doing so, AETC ensures that airmen are adequately prepared to perform their duties, aligning their training with the needs of the various functional areas within the Air Force. The STS, therefore, helps bridge the gap between higher command directives and practical training implementation, facilitating standardization and effectiveness across the force.

Other major commands listed, while they may have specific training and operational focuses, do not function as the primary authority responsible for the development and approval of the STS. Their roles are more concentrated on executing missions and operations rather than on the foundational training framework established by AETC.