The Missouri Coordinate System of 1983 is a manual intended to provide guidance for the PLS using the Missouri State Plane Coordinate System. It is not promulgated as a Missouri Code of State Regulations (CSR). Information on Missouri’s regulations for land surveyors and land owners is available online through the Missouri Code of State Regulations. Additional information on Missouri laws related to Geology, County Surveyors and Land Surveys, and Land Surveyors is also available online.