No minor under the age of sixteen (16) years of age shall be employed or permitted to work until the employer of such minor procures and keeps on file an employment certificate for such minor issued by the Commissioner pursuant to regulations. No such employment certificate shall be issued for employment in any occupation which has been defined as hazardous or detrimental to the life, health, morals, safety or well-being of minors, or for any occupation in which employment of a minor is otherwise forbidden by law.