1. Any subject may, by a vote of two-thirds of the Senators present, be made a special order of business for consideration and when the time so fixed for its consideration arrives the Presiding Officer shall lay it before the Senate, unless there be unfinished business in which case it takes its place on the Calendar of Special Orders in the order of time at which it was made special, to be considered in that order when there is no unfinished business. 2. All motions to change such order, or to proceed to the consideration of other business, shall be decided without debate.