CODE OF VIRGINIA INSTRUCTION OF MINERS (§ 45.1-161.110) The operator, or his agent, shall instruct all miners in the removal and installation of temporary and permanent roof supports as may be required by the roof control plan. HISTORY: Code 1950, § 45-68.2; 1954, c. 191; 1966, c. 594, § 45.1-40; 1975, c. 520; 1978, c. 729; 1984, c. 590; 1994, c. 28.