The western boundary of the 32nd meridian of longitude west from Washington was defined by the Act Organizing the Territory of Colorado, while the eastern boundary was defined by the Act Organizing the Territory of Arizona.
On February 28, 1861, the Act Organizing the Territory of Colorado defined the western boundary of the new territory as the 32nd meridian of longitude west from Washington. Two years later on February 24, 1863, the Act Organizing the Territory of Arizona defined the eastern boundary of the new territory as the 32nd meridian of longitude west from Washington. 
