C. An applicant for a first-class mine foreman certificate shall be at least 23 years of age and shall have had at least five years of experience in a coal mine, at least three years of which shall have been in an underground coal mine. A graduate of an approved course in mining engineering at a baccalaureate institution of higher education shall be given credit for three of the five years of practical experience required. An applicant who possesses a degree in mining technology shall be given credit for two of the five years of practical experience required. If the applicant meets the above requirements, makes 85 percent or more on each of the subjects of the written examination, and passes required map and gas examinations, he shall be entitled to a first-class mine foreman certificate. The written examination shall address, among other relevant topics, the theory and practice of coal mining; the nature and properties of noxious, poisonous, and explosive gases and methods for their detection and control; the requirements of the coal mining laws of the Commonwealth, including regulations adopted by the Department or the Board of Coal Mining Examiners; and the responsibilities and duties of a mine foreman under state law.