What information is included on a departure strip regarding the clearance?

The departure strip includes altitude information, which is critical for air traffic controllers as it provides the necessary details for ensuring the aircraft remains within safe altitude parameters during its climb-out phase. Altitude assignments are essential for separation between aircraft in busy airspaces and for compliance with air traffic control (ATC) clearances. By having this information clearly displayed on the strip, controllers can effectively manage the aircraft's departure and ensure it adheres to the flight plan and any ATC instructions.

While altitude is a key piece of information, the other options, such as estimated time over the previous strip, previous fix, and crew rest requirements, do serve important roles in various contexts. However, they are not typically included on standard departure strips, which focus on essential real-time data needed for departures.