TSgt Gomez identifies a maintained record that can only be implemented at the commander's level, referring to what?

The maintained record that can only be implemented at the commander's level is the Unfavorable Information Files (UIFs). UIFs are used to document instances of substandard performance, disciplinary actions, or other significant adverse information regarding an airman. The commander's involvement is necessary because maintaining and managing these files is part of the commander’s responsibility to ensure proper personnel management and to uphold standards within the unit. Commanders must assess the context and implications of the information contained in these files before making decisions that could impact an airman's career.

In contrast, unit inspections and performance evaluations involve broader processes that do not exclusively lie under the commander's purview. While one-on-one counseling is a valuable leadership tool, it is typically conducted at various levels of supervision and does not require the direct oversight of the commander. This distinction highlights the unique nature of UIFs as tools for the commander in the management and discipline of personnel.