When ATC issues a clearance short of the designated airport, what must be included?

When air traffic control (ATC) issues a clearance that is short of the designated airport, it is essential for the clearance to include proposed routing beyond the clearance limit. This is important because pilots need to understand how they will proceed once they reach the point where the clearance ends. By providing this information, ATC ensures that pilots are aware of the expected path to continue their flight safely and efficiently after reaching the clearance limit.

Including proposed routing beyond the clearance limit helps to maintain situational awareness for both pilots and air traffic controllers, ensuring that there are no misunderstandings about the flight's intended path. This is vital for maintaining safe separation between aircraft, especially in busy airspace.

The other options, while potentially useful in another context, do not meet the necessary requirements when a clearance is limited. For instance, while knowing the expected taxi route at the destination or having an alternate airport strategy can be important for overall flight planning, they do not directly pertain to the immediate need for routing information beyond the clearance limit. Additionally, giving no additional information is not sufficient, as it leaves the pilot without crucial guidance for their flight path after the clearance limit.