Section 33-137 - Recording, filing, publishing extensions and densifications of the ground marking systemA. Extensions and densifications of the ground marking system of the Arizona coordinate system, 1983, shall be executed in conformity with the standards and specifications of the federal geodetic control committee for first order, second order class I and second order class II surveys and computed on the North American datum, 1983.B. The results of these surveys shall be published by a competent department of the federal government, such as the national geodetic survey, or a surveyor qualified to practice in this state, in which case the survey results shall bear a certification to the effect that the specifications of the federal geodetic control committee have been followed.C. Extensions and densifications of the ground marking system by first order, second order class I or second order class II methods only shall be used. Such extensions and densifications shall be integrated with previously established horizontal control stations of equal or higher order to form a matrix or network no part of which shall have positional errors exceeding those specified for class II second order. The spacing intervals shall not exceed three miles.D. The results of these surveys are public domain and shall be duly recorded in the office of the county recorder of the county where the horizontal control station is situated.