1. A child shall not be employed, permitted or suffered to work at any gainful employment for more than three hours per day in any school day, more than eight hours in any nonschool day, more than six days or forty hours in any week. Normal work hours shall not begin before seven o’clock in the morning nor extend to after 9:00 p.m., except as provided in subsection 2 of this section. The provisions of this subsection may be waived by the director, in full or in part, depending upon the nature of the employment. Such waiver shall be provided in writing to the employer by the director. The waiver shall only exempt employment described in section 294.022.

2. On all evenings from Labor Day to June first, a child shall not be employed, permitted or suffered to work at any gainful employment after 7:00 p.m. nor after 9:00 p.m. from June first to Labor Day; except that a child who has passed his or her fourteenth birthday but is under sixteen years of age may be employed at a regional fair from June first to Labor Day, if such child does not work after 10:30 p.m., is supervised by an adult, parental consent is given and the provisions of this subsection are complied with. The regional fair exception shall not apply to those entities covered by the Fair Labor Standards Act. The provisions of this subsection do not apply to children who have been permanently excused from school pursuant to the provisions of chapter 167. The provisions of this subsection may be waived by the director, in full or in part, depending upon the nature of the employment. Such waiver shall be provided in writing to the employer by the director. The waiver shall only exempt employment described in section 294.022.