2. The neutral flag covers enemy's goods with the exception of contraband of war.
3. Neutral goods, with the exception of contraband of war, are not liable to capture under enemy's flag.
4. Blockades, in order to be binding, must be effective; that is to say, maintained by a force sufficient really to prevent access to the coast of the enemy.
Not only did this solemn declaration announce to the world the principles to which the signing powers agreed to conform in future wars, but it contained a clause to which those powers gave immediate effect, and which provided that the States not parties to the Congress of Paris should be invited to accede to the declaration. Under this invitation every independent State in Europe yielded its assent — at least, no instance is known to me of refusal; and the United States, while declining to assent to the proposition which prohibited privateering, declared that the three remaining principles were in entire accordance with their own views of international law. No instance is known in history of the adoption of rules of public law under circumstances of like solemnity, with like unanimity, and pledging the faith of nations with a sanctity so peculiar.
When, therefore, this Confederacy was formed, and when neutral powers, while deferring action on its demand for admission into the family of nations, recognized it as a belligerent power, Great Britain and France made informal proposals about the same time that their own rights as neutrals should be guaranteed by our acceding as belligerents to the declaration of principles made by the Congress of Paris. The request was addressed to our sense of justice, and therefore met immediate favorable response in the resolutions of the Provisional Congress of the 13th of August, 1861, by which all the principles announced by the Congress of Paris were adopted as the guide of our conduct during the war, with the sole exception of that relative to privateering. As the right to make use of privateers was one in which neutral nations had, as to the present war, no interest; as it was a right which the United States had refused to abandon, and which they remained at liberty to employ against us; as it was a right of which we were already in actual enjoyment, and which we could not be expected to renounce flagrante bello against an adversary