As of November 2015, California, Maryland, New Jersey and New York are among 41 states, Puerto Rico and the District of Columbia that issue work permits, according to the U.S. Department of Labor. The permits are known in federal regulations as certificates of age.
In California, the state's Department of Industrial Relations says that work permits are required for all minors. School districts issue the most permits. Entertainment workers receive their permits from the Division of Labor Standards Enforcement.
The Maryland Division of Labor and Industry issues work permits to minors age 14 to 17, according to the state's Department of Labor, Licensing and Regulation. The application is printed after it is filed online, and the minor, parent or guardian, and employer must sign the permit for it to become valid.
The New Jersey Department of Workforce Development requires work permits for minors. Special permits are required for 11- to 15-year-old newspaper carriers, 12- to 15-year-olds in agriculture, and children under 16 years old for performers. The application requires employers to state a promise of employment before a permit is issued.
According to the New York Department of Labor, work permits are issued to minors by school officials for most employment. The department issues permits for child performers.
In Wisconsin, the Department of Workforce Development states that a work permit is required for minors unless they are employed in agriculture or domestic service. Applicants file for permits through school offices or state work-permit offices.