What must be included in a clearance beyond a clearance limit?

The correct answer is centered around the necessity for providing detailed instructions to ensure safe and efficient aircraft operations. When a controller issues a clearance beyond a clearance limit, it is essential to include both the clearance limit and the specifics of the route of flight. This is critical as it informs the pilot not only about where they are allowed to proceed but also how to navigate to their next destination safely and in compliance with air traffic control protocols.

Including the details of the route helps to avoid confusion and ensures that pilots understand the required path they must follow, which is especially important in busy airspace. Ensuring clarity in clearances minimizes the chances of miscommunication, which can lead to safety incidents.

Other options do not provide comprehensive or essential information that must be conveyed in such situations. For instance, issuing only an approach clearance lack the necessary routing information; providing just the previous altitude does not help in navigating to the next segment of the flight; and discussing local weather conditions, while useful, does not address the critical need for routing and clearance information.