New Mexico Territorial Laws and Treaties NM TREATIES GADSDEN TREATY, Art. 4

The provisions of the 6th and 7th Articles of the treaty of Guadalupe Hidalgo having been rendered nugatory, for the most part, by the cession of territory granted in the First Article of this treaty, the said articles are hereby abrogated and annulled, and the provisions as herein expressed substituted therefor. The vessels, and citizens of the United States shall, in all time, have free and uninterrupted passage through the gulf of California, to and from their possessions situated north of the boundary line of the two countries. It being understood that this passage is to be by navigating the gulf of California and the river Colorado, and not by land, without the express consent of the Mexican government; and precisely the same provisions, stipulations and restrictions, in all respects, are hereby agreed upon and adopted, and shall be scrupulously observed and enforced by the two contracting governments in reference to the Rio Colorado, so far and for such distance as the middle of that river is made their common boundary line by the First Article of this treaty.

The several provisions, stipulations and restrictions contained in the 7th Article of the treaty of Guadalupe Hidalgo shall remain in force only so far as regards the Rio Bravo del Norte, below the initial of the said boundary provided in the First Article of this treaty; that is to say, below the intersection of the 31 deg. 47 min. 30 sec. parallel of latitude, with the boundary line established by the late treaty dividing said river from its mouth upwards, according to the Fifth Article of the treaty of Guadalupe.