Section 33-131 - Arizona coordinate system, 1983; zones; compositionA. The Arizona coordinate system, 1983, is the system of plane coordinates which has been established by the national geodetic survey for defining and stating the positions or locations of points on the surface of the earth in this state.B. The Arizona coordinate system, 1983, contains three zones as follows:1. The west zone, composed of La Paz, Mohave and Yuma counties.2. The central zone, composed of Coconino, Maricopa, Pima, Pinal, Santa Cruz and Yavapai counties.3. The east zone, composed of Apache, Cochise, Gila, Graham, Greenlee and Navajo counties.C. In any land description in which the Arizona coordinate system, 1983, is utilized the system shall be designated "Arizona coordinate system, 1983, __________ zone", with the name of the appropriate zone inserted.