§ 14. Reports of compensation plan. Each employer who shall sign with any employee a consent to the plan shall, within thirty days thereafter, file with the industrial commission a statement thereof, signed by such employer, which shall show (a) the name of the employer and his post-office address, (b) the name of the employee and his last known post-office address, (c) the date of, and office where the original consent is filed, (d) the weekly wage of the employee at the time the consent is signed; unless such statement is duly filed, such consent of the employee shall not be a bar to any proceeding at law commenced by the employee against the employer.