would require that any legislation concerning regulation of foreign commerce through tariffs or quotas (that is, any laws akin to England's "Navigation Acts") pass only with two-thirds majorities of both houses of Congress. While much of the rest of the committee's report would be accepted without serious challenge on the Convention floor, these last three proposals provoked outrage from Northern delegates and slavery opponents. The final report of the committee, which became the first draft of the Constitution, was the first workable constitutional plan, as Madison's Virginia Plan had simply been an outline of goals and a broad structure. Even after it issued this report, the committee continued to meet off and on until early September. Further modifications and concluding debate Another month of discussion and relatively minor refinement followed, during which several attempts were made to alter the Rutledge draft, though few were successful. Some wanted to add property qualifications for people to hold office, while others wanted to prevent the national government from issuing paper money. Madison in particular wanted to push the Constitution back in the direction of his Virginia plan. One important change that did make it into the final version included the agreement between northern and southern delegates to empower Congress to end the slave trade starting in 1808. Southern and northern delegates also agreed to strengthen the Fugitive Slave Clause in exchange for removing a requirement that two-thirds of Congress agree on "navigation acts" (regulations of commerce between states and foreign governments). The two-thirds requirement was favored by southern delegates, who thought Congress might pass navigation acts that would be economically harmful to slaveholders. Once the convention had finished amending the first draft from the Committee of Detail, a new set of unresolved questions were sent to several different committees for resolution. The Committee of Detail was considering several questions related to habeas corpus, freedom of the press, and an executive council to advise the president. Two committees addressed questions related to the slave trade and the assumption of war debts. A new committee was created, the Committee on Postponed Parts, to address other questions that had been postponed. Its members, such as Madison, were delegates who had shown a greater desire for compromise and were chosen for this reason as most in the Convention wanted to finish their work and go home. The committee dealt with questions related to the taxes, war making,