the states, and raising and maintaining fleets and navies". Thomas Jefferson countered that Congress's powers "can all be carried into execution without a national bank. A bank therefore is not necessary, and consequently not authorized by this phrase". Chief Justice John Marshall agreed with the former interpretation. Marshall wrote that a Constitution listing all of Congress's powers "would partake of a prolixity of a legal code and could scarcely be embraced by the human mind". Since the Constitution could not possibly enumerate the "minor ingredients" of the powers of Congress, Marshall "deduced" that Congress had the authority to establish a bank from the "great outlines" of the general welfare, commerce and other clauses. Under this doctrine of the necessary and proper clause, Congress has sweepingly broad powers (known as implied powers) not explicitly enumerated in the Constitution. However, the Congress cannot enact laws solely on the implied powers, any action must be necessary and proper in the execution of the enumerated powers. Section 9: Limits on Federal power The ninth section of Article One places limits on federal powers, including those of Congress: Clause 1: Slave trade The first clause in this section prevents Congress from passing any law that would restrict the importation of slaves into the United States prior to 1808. Congress could, however, levy a per capita duty of up to ten Spanish milled dollars for each slave imported into the country. This clause was further entrenched into the Constitution by Article V, where it is explicitly shielded from constitutional amendment prior to 1808. On March 2, 1807, Congress approved legislation prohibiting the importation of slaves into the United States, which went into effect January 1, 1808, the first day of the prohibition permitted by the Constitution. This clause did see brief life outside of the slavery context in the late 1790s when the Virginia General Assembly cited it in arguing the Alien Enemies Acts was unconstitutional, the federal act being used by the Adams administration to deport French immigrants the Commonwealth had itself saw proper to admit. Clauses 2 and 3: Civil and legal protections A writ of habeas corpus is a legal action against unlawful detainment that commands a law enforcement agency or other body that has a person in custody to have a court inquire into the legality of the detention. The court may order the person released if the reason for detention is