I don't mean to speak for Ms. Jennings, but in my experience, when a subcommittee meets and there's a consensus, the information is brought to the full committee so that it can be conveyed to all members. If there's no consensus on the subcommittee, it automatically becomes an item for debate in the full committee. I think Ms. Jennings' motion is an attempt to clarify the situation, i.e., any item that is not agreed on unanimously by the subcommittee would be debated in the full committee.
On May 3rd, 2006. See this statement in context.