Which document governs the allocation of airspace and control measures within a defined area?

• A. The Airspace Control Order (ACO).
• B. The Joint Security Implementation Plan.
• C. The Weather and Visibility Plan.
• D. The Tactical Rendezvous Plan.

Answer: (A)

Allocating airspace and setting control measures within a defined area is governed by the Airspace Control Order. This document specifies which portions of airspace are available, who has authority to use them, and the control measures in effect, including boundaries, coordination requirements, and timing. It ties together airspace boundaries, control methods (such as positive control or advisory control), and unit responsibilities to ensure safe and effective joint air operations. The other options focus on security procedures, weather-related flight constraints, or rendezvous procedures, none of which establish the official allocation of airspace or the required control measures.