https://www.dllr.state.md.us/forms/essminorspecworkpermitapp.pdf
“Work permits are required for all minors UNDER the age of 18 to work in the State of Maryland. “
“Work permits are required UNTIL the minor’s 18th birthday”
(“and to such point")
’18 세 생일이 지난 다음날부터 미성년자 개념이 해지’ 가 매릴랜드 미성년자 고용 (Employment of Minors) 웹사이트에 언급 되어있네요.
Department of Labor: (410) 767-2357