(a) A work permit issued under this article shall set forth the full name and the date and place of birth of the child, with the name and address of his or her parents or parent, guardian or custodian. It shall certify that the child has appeared before the officer issuing the permit and submitted proofs of age, school attendance, prospective employment, brief description of job and parental or other consent required in section three.

(b) The state commissioner of labor shall prepare printed forms for work permits and furnish them to the superintendents of schools in the counties of the state. A copy of each permit issued shall be forwarded to the state commissioner of labor within four days after its issuance. A record of all permits granted and of all applications denied as well as all certificates of age, and documents evidencing school attendance, prospective employment, brief description of job and parental or other consent submitted by the applicants for permits shall be kept in the office of the issuing officer.

(c) The state commissioner of labor may at any time revoke a permit if in his or her judgment it was improperly issued, and for this purpose he or she is authorized to investigate the true age of any child employed, to hear evidence, and to require the production of relevant books and documents. If a permit is revoked, the issuing officer shall be notified of the action, and the child may not thereafter be employed or permitted to labor until a new permit has been legally obtained or until the child is to be outside the operation of this article.