New Mexico Territorial Laws and Treaties NM TREATIES GADSDEN TREATY, Art. 6

No grants of land within the territory ceded by the first article of this treaty bearing date subsequent to the day--twenty-fifth of September--when the minister and subscriber to this treaty on the part of the United States, proposed to the government of Mexico to terminate the question of boundary, will be considered valid or be recognized by the United States, or will any grants made previously be respected or be considered as obligatory which have not been located and duly recorded in the archives of Mexico.