The constitutional text

Article I · Section 8

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The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;

To borrow Money on the credit of the United States;

To regulate Commerce with foreign Nations, and among the several States, and with the Indian Tribes;

To establish an uniform Rule of Naturalization, and uniform Laws on the subject of Bankruptcies throughout the United States;

To coin Money, regulate the Value thereof, and of foreign Coin, and fix the Standard of Weights and Measures;

To provide for the Punishment of counterfeiting the Securities and current Coin of the United States;

To establish Post Offices and post Roads; To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries;

To constitute Tribunals inferior to the supreme Court;

To define and punish Piracies and Felonies committed on the high Seas, and Offenses against the Law of Nations;

To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water;

To raise and support Armies, but no Appropriation of Money to that Use shall be for a longer Term than two Years;

To provide and maintain a Navy;

To make Rules for the Government and Regulation of the land and naval Forces;

To provide for calling forth the Militia to execute the Laws of the Union, suppress Insurrections and repel Invasions;

To provide for organizing, arming, and disciplining, the Militia, and for governing such Part of them as may be employed in the Service of the United States, reserving to the States respectively, the Appointment of the Officers, and the Authority of training the Militia according to the discipline prescribed by Congress; To exercise exclusive Legislation in all Cases whatsoever, over such District (not exceeding ten Miles square) as may, by Cession of particular States, and the Acceptance of Congress, become the Seat of the Government of the United States, and to exercise like Authority over all Places purchased by the Consent of the Legislature of the State in which the Same shall be, for the Erection of Forts, Magazines, Arsenals, dock-Yards and other needful Buildings; -And

To make all Laws which shall be necessary and proper for carrying into Execution the foregoing Powers, and all other Powers vested by this Constitution in the Government of the United States, or in any Department or Officer thereof.

Source: National Constitution Center edition. Original wording is preserved; commentary explains historical and superseded provisions.

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Article I, Section 8, Clause 10a

Offenses on the high seas

Current text
To define and punish Piracies and Felonies committed on the high Seas,

What it means

Congress may define and punish piracy and felonies committed on the high seas. The national allocation addresses serious offenses outside the ordinary territorial setting of a single state.

Historical setting

The Articles provided national arrangements for piracy trials but lacked the same general legislative formulation. Federalist 42 treated coherent maritime criminal authority as part of responsible relations with the wider world.

What it does

Congress must define offenses through law rather than leave every case to an improvised executive accusation. The separate Article III provisions concerning admiralty and maritime cases supply related judicial structure.

Debate & interpretation

The term define highlights the need for legal clarity where conduct crosses territorial boundaries. Questions about jurisdiction remain important because a national power over high-seas offenses is not automatically a universal police power over every foreign event.

A common misreading

The clause does not authorize federal punishment of any conduct anywhere simply because an American official disapproves of it.

Think it through

Why do crimes beyond an individual state’s territorial borders call for national legal coordination?

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Sources & further reading

Original Madison Center commentary. Explanations distinguish the text, historical context, and interpretive disagreements.

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