An amendment to the Articles of Confederation had been proposed, giving Congress the power of levying customs-duties and appointing the collectors. By the summer of 1786 all the states except New York had consented to this. But in order to amend the articles, unanimous consent was necessary, and in February, 1787, New York's refusal defeated the amendment. Congress was thus left without any immediate means of raising a revenue, and it became quite clear that something must be done without delay.