Which of the following is a valid motion to manage meeting duration?

A valid motion to manage meeting duration is "Fix the Time to Which to Adjourn." This motion allows members to set a specific time to end the meeting, ensuring that discussions stay within a predetermined timeframe. It serves as a tool for members to maintain control over scheduling and can be particularly useful when meetings tend to run long or when there are time constraints that need to be honored. By adopting this motion, participants can agree on the timeline for concluding the meeting, which helps in maintaining order and efficiency.

The other choices do not pertain to managing meeting duration in the same way. "Propose New Business" introduces new topics for discussion rather than managing time. "Request a Division of the Assembly" is used to clarify the outcome of a vote when there is uncertainty, while "Point of Order" addresses procedural correctness rather than the timing of the meeting. Thus, these options do not focus on managing when the meeting will adjourn, making the first choice the clear and valid motion for that purpose.