Federal Constitution of the United Mexican States (1824)
The Restrictions of the Powers of the States.
Article 162. No state can,
1st. Establish tonnage duties nor ports of entry without consent of congress.
2d. Impose duties on imports and exports without consent of congress.
3d. Have a standing army or navy without the consent of congress.
4th. Engage in transactions or declare war with foreign powers, resisting them however in case of actual invasion, of which immediate notice is given to congress.
5th. Enter upon any transaction with other states of the Union, without consent of congress, or its subsequent approval if it has reference to boundaries.