It had, nevertheless, been made part of the limitations upon the commercial power, embraced in the report of the committee of detail, that a navigation act should require a vote of two thirds of both branches of the legislature. The vote which adopted the prohibition against taxes on exports, taken on the 21st of August, was followed, on that day and the next, by an excited debate on the taxation of the slave-trade, in which the three States of Georgia, North Carolina, and South Carolina made the limitation upon the power of the Union over this traffic the condition of their accepting the Constitution. This debate was closed by the proposition of Gouverneur Morris, to refer the whole subject to a committee of one from each State, in order that the three matters of exports, the slave-trade, and a navigation act might form a bargain or compromise between the Northern and the Southern States.[224] But the prohibition against taxing exports had already been agreed to, and there remained to be committed only the proposed restriction against taxing or prohibiting the migration or importation of such persons as the States might see fit to admit, the restriction which required a capitation tax to conform to the census, and the proposed limitation upon the power to pass a navigation act. Thus, in effect, the questions to come before this committee were, whether the slave-trade should be excepted from both the commercial and revenue powers of the general government, and whether the commercial power should be subjected to a restriction which required a vote of two thirds in dealing with the commercial interests of the Union. We know very little of the deliberations of this committee; but as each State was equally represented in it, and as the position of the different sectional objects is quite clear, we can have no difficulty in forming an opinion as to the motives and purposes of the settlement which resulted from their action, or in obtaining a right estimate of the result itself.