When a main motion is pending, which of the following motions would NOT be in order if a motion to Amend is being debated?

When a main motion is pending and a motion to amend is under debate, the ability to introduce certain motions is limited based on parliamentary procedure. The motion to Postpone Indefinitely is typically used to suppress a main motion without directly voting against it. When a motion to amend is being debated, this option is not permissible because it would effectively override the more specific discussion regarding the amendment itself.

In contrast, the motions to Limit or Extend Limits of Debate, Previous Question, and Postpone to a Certain Time can all still be appropriately made while an amendment to a main motion is being considered. These motions are designed to manage the debate process rather than to suppress the main motion. The ability to control discussion and timing remains in effect, allowing for a structured debate on the pending amendment. Therefore, only the motion to Postpone Indefinitely would not be in order during this specific scenario.