Final answer:
A postponement can be made when a main motion and an amendment are pending if the legislative body's rules allow for such a motion, even in the context of unlimited debate and filibustering in the Senate.
Step-by-step explanation:
Whether a postponement can be made when a main motion and an amendment are pending depends on the legislative body's specific rules and procedures. In the context of the United States legislative process, both the House of Representatives and the Senate have unique rules regarding the debate and amending of bills. During Senate Action, there is typically unlimited debate, and amendments do not have to be germane to the main motion, meaning they do not need to be closely related or relevant. In the House, before reaching the floor, a bill and its amendments are subjected to rules established by the House Committee on Rules which sets the framework for debate and amending.
A filibuster in the Senate can delay action on a bill, as debate continues until no one seeks to be recognized or until a cloture motion is passed. However, if the rules of the chamber allow for it, a motion to postpone to a certain time can be made even with a main motion and amendment pending, effectively scheduling when the bill will be considered again. This motion could be subject to a vote, and if agreed upon, would delay the consideration of the bill and its amendments.