Child Labor Laws apply to all employees who are under 18 years of age. Once a person is 18, they are considered an adult.Texas' child labor laws apply to all children under the age of 18 working in Texas, whether or not they reside in the state. Child labor laws cover any employee under 18 years of age. Once someone reaches age 18, they are considered an adult. Consult 51.0145 Texas Labor Code for exceptions and requirements. However, employers of minors under age 18 must obtain and keep on file proof of the minor's age. Ages 12 and 13: Farm work on someone else's farm with a parent's consent performed outside of school hours. The work may not be "hazardous.". The Texas Labor Code defines a child as any individual under the age of 18 years.