Using exemption 3585 affects which planning requirement?

• A. The number of alternates required
• B. The maximum flight time allowed
• C. The permitted duty hours
• D. Crew rest requirements

Answer: (A)

Exemption 3585 is about how you plan for alternates. It changes the requirement for the number of alternate airports you must designate under certain forecast and planning conditions. Because it directly modifies how many alternates are needed, it’s about the alternate planning requirement. The other items—maximum flight time, permitted duty hours, and crew rest—are governed by different rules and aren’t adjusted by this exemption, so they aren’t affected. For example, if the weather and planning criteria meet the exemption’s conditions, you may reduce the number of required alternates, such as using a single suitable alternate instead of two.