Section 6968 - First-Aid Training(a) At underground mines employing more than 5 men, a sufficient number of supervisors and workmen shall be trained in the U.S. Bureau of Mines Manual of First-Aid Instructions so that at least 25 percent of the personnel are so trained.(b) Some person trained in first aid shall be readily available at surface operations where five or more workers are employed at one time.(c) The training should be given by the U.S. Bureau of Mines, or it may be given by an instructor holding an effective first-aid instructor's certificate from the U.S. Bureau of Mines, or by anyone holding an effective Red Cross Instructor's Certificate, or by a licensed physician.Cal. Code Regs. Tit. 8, § 6968