As regards the implementation of these agreements, the Presidents have adopted different positions. For this reason, claiming that a law was passed „unanimously“ when in fact it was passed by „unanimous consent“ can be misleading in terms of the level of support.  The first unanimous approval agreement in the U.S. Senate is awarded to William Allen of Ohio. In 1846 Allen and other senators agreed to an agreement to allow debate on the addition of the Oregon Territory. This one-time agreement has become a common practice in the U.S. Senate, despite senators` concerns about stifling debate. It is not known when the Senate began using unanimous consent agreements to limit debate or set a date for a vote on a measure. The first case may have occurred in the mid-1840s. On March 24, 1846, Senator William Allen, D-OH, declared that the Senate had been debating a joint resolution on the Oregon Territory for more than two months and that it was now time for a final vote on the matter. Senator Allen noted that the Senate had not allowed the previous question (a motion used in the House of Representatives to end debate) or passed a resolution ordering a vote at a certain time, noting that the Senate used to „understand that a long debate would end at a certain time.“ 3 A colleague in the Senate suggested that Allen delay several days before making such a request. Sometimes unanimous approval can be presumed if the Chair feels that no one would raise an objection if he formally requested it.
 For example, if it is clear that members of an Assembly are busy listening to a speaker who has exceeded the debate deadlines but is about to be completed, the Presidency may allow the speaker to continue without interruption.  In short, uncertainties and controversies prompted the Senate on January 16, 1914, to enact a formal rule for unanimous consent agreements. Article XII has had relatively little discussion. The biggest controversy was whether these pacts could be changed by a new unanimous approval. It is not surprising that Senator Lodge objected to the new rule on the grounds that allowing subsequent amendments to unanimous consent agreements would only result in delays in expediting the work of the Senate. Senator Charles Thomas, D-CO, replied, „It seems to me that it is the most illogical thing in the world to say that the United States Senate can unanimously approve something and, by this law, deprive itself of the power to unanimously agree to undo it.“ 19 Several independent resolutions may be tabled in a single motion. The examination of such a request by a vote requires unanimous approval. Each member may request a split vote on one or more of the independent resolutions.  A meeting could be adjourned unanimously.
If, at the end of a meeting, there is no one left in business, the president simply declares the meeting adjourned, without a formal request or vote.  Unanimous consent agreements are special resolutions of the Senate, which are approved without objection by members of the House. These devices, which are fundamental to the administration of the contemporary Senate, are generally used to structure the plenary procedure and to expedite the commercial activities of the House. Two general types of unanimous approval permeate the Senate`s activities: „simple“ and „complex.“ 1 Both types repeal rules, precedents or orders of the Senate by the unanimous consent of all Senators. A simple request for unanimous consent deals with common issues, such as . B.dem waiver of quorum calls or request that certain employees have floor privileges. Certainly, there are cases where a simple request for unanimous consent can have political consequences, such as. B, an objection to the repeal of an amendment or the abandonment of the reading of an amendment […].