UNITED STATES CONSTITUTION
Article I
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Section 9. . . . .
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No bill of attainder or ex post facto Law shall be passed.
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Section 10. No state shall enter into any treaty, alliance, or confederation; grant letters of marque and reprisal; coin money; emit bills of credit; make anything but gold and silver coin a tender in payment of debts; pass any bill of attainder, ex post facto law, or law impairing the obligation of contracts, or grant any title of nobility.
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