MOC meaning in Regional ?

The Central Midland Railway (reporting mark CMR), a division of Progressive Rail Incorporated of Lakeville, Minnesota, is a short line railroad in the U.S. state of Missouri, operating under lease of the former St. Louis Subdivision of the Chicago, Rock Island and Pacific Railroad. CMR operates the easternmost 60 miles of the 298-mile Rock Island line which used to stretch from St. Louis to Kansas City, Missouri. Today, CMR's operation of the line is performed under two separate leases from the Union Pacific Railroad and the A&K Railroad Materials Corp, respectively, from Overland, Missouri - a suburb of St. Louis, to a location just west of Union, Missouri. CMR's first leased-segment is Union Pacific's "Lackland Subdivision" which extends from "Rock Island Junction" near the intersection of Page Avenue and I-170 in Overland to a location on the north-side of Creve Coeur Lake in Maryland Heights, Missouri, known as "Vigus." The second leased-segment is owned by A&K Railroad Materials and extends from Vigus to just east of Beaufort, Missouri, with active service terminating at Union.