Where are IFR flight rules and requirements for IFR flights in controlled and uncontrolled airspace specified?

Where are IFR flight rules and requirements for IFR flights in controlled and uncontrolled airspace specified?

• A. AIP Part 2 ENR3
• B. AIM Chapter 4
• C. AIP Part 2 ENR1.3
• D. AIP Part 1 ENR1

Answer: (C)

IFR flight rules and requirements for IFR flights in both controlled and uncontrolled airspace are published in the AIP Part 2, ENR 1.3. ENR 1 covers general en-route operating rules, and ENR 1.3 specifically outlines the rules for IFR operations, including flight plans, ATC clearances, routing, altitude assignments, and required equipment or visibility minima that apply across airspace. The other options don’t fit because ENR3 in Part 2 is a different en-route topic, AIM Chapter 4 belongs to a different information manual, and Part 1 ENR1 contains general publication information rather than the IFR rules themselves.

IFR flight rules and requirements for IFR flights in both controlled and uncontrolled airspace are published in the AIP Part 2, ENR 1.3. ENR 1 covers general en-route operating rules, and ENR 1.3 specifically outlines the rules for IFR operations, including flight plans, ATC clearances, routing, altitude assignments, and required equipment or visibility minima that apply across airspace. The other options don’t fit because ENR3 in Part 2 is a different en-route topic, AIM Chapter 4 belongs to a different information manual, and Part 1 ENR1 contains general publication information rather than the IFR rules themselves.