The Department of Transportation shall maintain, extend, and expand the system for precise control of horizontal and vertical surveys, which system was established and installed by a Board of Commissioners authorized by, and acting pursuant to Ordinance 1893-098. This system shall be known as the Baltimore Survey Control System. City Code, 1893, art. 1, §68(Supp.) 1927, art. 31, §1 1950, art. 36, §5 1966, art. 27, §5 1976/83, art. 27, §4 Ord. 1893-098 Ord. 48-466 Ord. 76-140 Ord. 15-435