Again, it depends on the text of the motion and what it includes. I don't have the actual motion in front of me, so it's hard for me to answer you.
Generally, this type of motion comes before the introduction of amendments, so that the subject matter of the bill can be expanded immediately and the amendments considered after the fact. If I understand correctly, in this case you're talking about a retroactive motion. The extent to which that would work depends on the wording of the motion. So it's a little difficult for me to definitively answer your question.