Which statement about IAFDOF entering sector 66 is true?

• A. IAFDOF altitudes which were fixed are forwarded to the next sector as if they were a requested altitude.
• B. Coordination with a receiving controller must be completed after the frequency change.
• C. Aircraft meeting the requirements of JO 7110.65 may remain IAFDOF with coordination, including the reason.
• D. Students must identify the reason to the Radar Controller prior to the boundary.

Answer: (D)

When a flight on an IAFDOF enters a new sector, the receiving radar controller must know why the aircraft is entering that sector before the boundary is crossed. This reason provides essential context for handoff, sequencing, and how the aircraft will be managed within the new airspace. Without that reason, the controller can’t quickly and safely integrate the aircraft into traffic flow or assign appropriate vectors and altitude constraints.

That’s why identifying the reason to the Radar Controller prior to boundary crossing is the best choice: it ensures clear, pre-boundary coordination and proper sector transfer. The other statements either misstate how handoffs and altitude information are conveyed, imply coordination after the frequency change, or suggest staying in the IAFDOF condition with only general coordination, which does not emphasize the required pre-boundary identification of the purpose of the entry.