When a reroute causes an aircraft to proceed into another ZAE sector not previously on the route, coordination must be accomplished in a timely manner.

• A. No coordination required
• B. Coordination must be accomplished in a timely manner
• C. Only coordination if altitude changes
• D. Reroute may be implemented without verification

Answer: (B)

Coordinating with the receiving sector is essential whenever a reroute takes an aircraft into a different ZAE sector that wasn’t on the route before. This ensures the next controller is aware of the aircraft, can adjust workload and airspace capacity, and can perform a proper handoff with the correct route and altitude as needed. Timeliness matters so there’s no gap in surveillance or awareness that could lead to conflicts or degraded separation.

No coordination is not acceptable because the receiving sector becomes responsible once the aircraft enters it, and they must be prepared. Coordination only if altitude changes is too narrow a rule—the need to inform and align with the next sector applies regardless of altitude. Implementing a reroute without verification contradicts safety procedures and would leave the next sector unaware of the change.