A. Each mine shall have a personnel checking system containing the following: 1. Every person underground shall have on his person means of positive identification bearing a number recorded by the operator; 2. An accurate record of the persons in the mine shall be kept on the surface in a place that will not be affected by an explosion; 3. The record shall consist of a written record, check board, lamp check, or time-clock record; and 4. The record shall bear a number identical to that carried by the person underground. B. Mine-wide tracking systems shall be maintained in useable and operative conditions. History Code 1950, § 45-70; 1954, c. 191; 1966, c. 594, § 45.1-97; 1994, c. 28; 2015, cc. 103, 397.