Minors may not work during school hours while school is in session. • Minors age 14 and 15 years old combined hours of school and work cannot exceed 48.Michigan law does not permit a minor who lied about his or her age to disaffirm (get out of) a contract. Act 15 of 1946 (1st Ex. Sess.) AN ACT to authorize persons who are entitled to the benefits obtainable under the federal "servicemen's. Minors under 18 years of age must obtain a work permit or a written agreement or contract entered into between the employer and the governing school district. Minors, likewise, are not considered able to enter contracts because of the potential for manipulation. Learn about rules governing a contract with a minor. Minors are not permitted to enter a contract under certain exceptions such as sports contracts or purchase of goods. State Bar of Michigan. The Law: for.Minors,.Parents,.and.