If you are aged 14-17 you will need an employment certificate, also called working papers, in order to hold a job in New York State. Work permits are required for all minors under the age of 18 to work in the State of Maryland.Child Labor Enforcement. Students who attend Sweetwater Union High School District are required to obtain a work permit if they are under 18 years old, and have secured paid employment. Montgomery County is an equal opportunity employer. Work Authorization Options. Employment, Internships, and Career Services.