The employer, or person authorized by him or her in writing, shall forward to the commissioner of labor the following information:
The commissioner of labor shall acknowledge the receipt of the information with a letter which shall be retained on file by the employer for the duration of the minors' employment. The commissioner of labor, after making proper inquiry, may issue a blanket work permit for an employer for a period not to exceed ninety days.
W. Va. Code § 21-6-8a