Final answer:
FASFACs/Approach control is required to provide staffing based on agreements in a Letter of Agreement (LOA) with air traffic controllers to ensure efficient and safe airspace management.
Step-by-step explanation:
FASFACs/Approach control shall provide staffing for associated airspace as agreed upon in an LOA with air traffic controllers. An LOA, or Letter of Agreement, is a formal document that establishes operational procedures and coordination methods between different entities that manage airspace, such as air traffic control facilities. The LOA is designed to ensure efficiency and safety in handling air traffic and typically involves details such as sector responsibilities, handoff procedures, and communication protocols.