When route and altitude in a previously issued clearance is amended, _____________ must be restated.

• A. Route
• B. Speed restrictions
• C. Altitude restrictions
• D. Aircraft type

Answer: (C)

When a clearance is updated to change both the route and the altitude, the altitude restrictions must be restated to ensure the pilot has a clear, current vertical requirement. Altitude constraints are critical for maintaining safe separation and proper sequencing, and they may not automatically transfer or remain understood if the route changes. Restating them eliminates ambiguity about the new required altitudes at specific fixes or segments. The amended route itself provides the new path, so restating the route isn’t necessary; speed restrictions and aircraft type aren’t the focus of this particular restatement unless they were part of the amendment.