Final answer:
The motion to rescind allows a deliberative body to reverse a previous decision. It is typically classified as a subsidiary or incidental main motion, depending on its application to pending or adopted actions.
Step-by-step explanation:
The purpose of the motion to rescind is to allow a deliberative assembly to cancel or annul a previous action or decision that body has made. Generally, this motion is allowed within a certain time frame following the decision, thereby providing a chance to reevaluate and potentially reverse a decision should new information come to light or opinions change. The motion to rescind belongs to a class of motions known as subsidiary motions when applied to a main motion that is pending, or incidental main motions when applied to something already adopted. In parliamentary procedure, these are motions that are related to the main motion and are intended to affect the main motion either by amending, delaying, or entirely negating it.