No person shall drive a school bus as provided in RSA 266:7 unless he is 18 years of age or over and has been certified for said driving by the school board, as provided in RSA 263:29.
RSA 263:24
1945, 90:2. RSA 263:29. 1965, 207:3. 1973, 72:57. 1981, 146:1, eff. Jan. 1, 1982.