But the proposal of the 30th of April, 1784, met with a tardy and reluctant attention among the States. Only one of them had acted upon it, as late as the following February, when the delegates for Maryland laid before Congress an act of that State upon the subject.[286] New Hampshire was the next State to comply, in the succeeding June.[287] In the mean time, however, Congress prepared to prosecute negotiations in Europe, trusting to the chances of an enlargement of their powers, in pursuance of their recommendation. Accordingly, they proceeded, in the spring of 1784, to appoint a commission to negotiate commercial treaties, and settled the principles on which such treaties were to be formed. The leading principle then determined on was, that each party to the treaty should have a right to carry their own produce, manufactures, and merchandise in their own bottoms to the ports of the other, and to take thence the produce, manufactures, and merchandise of the other, paying, in both cases, such duties only as were paid by the most favored nation. The resolves appointing the commission also contained a very explicit direction, that "the United States, in all such treaties, and in every case arising under them, should be considered as one nation, upon the principles of the Federal Constitution."[288] Yet the Federal Constitution did not, at that very moment, make the United States one nation for this purpose. Its principles gave to Congress no authority which could prevent the States from prohibiting any exportations or importations whatever, as to their respective territories; and the validity of these treaties, thus proposed to be negotiated with fifteen European powers, depended altogether upon the precarious assent of the thirteen States to the alterations in the principles of the Federal Constitution which Congress had proposed.