Section 4. The employment certificates required by the provisions of this act shall be issued as follows:--
In school districts having a district superintendent or supervising principal, by such superintendent or supervising principal; in school districts having no superintendent or supervising principal, but having one or more principals of schools, by such principals, each principal to issue the certificate to minors residing within the territory belonging to the school over which he has supervision; in school districts, or parts of districts, having no district superintendent or principal, by the secretary of the board of school directors for that district: Provided, That any district superintendent, supervising principal of schools, or secretary of the board of school directors, hereby directed to issue such certificates, may authorize and deputize, in writing, such persons as they may see proper, to act in their place and stead for the purpose of issuing such certificates. Any of the hereinbefore mentioned officials, authorized to issue employment certificates, before doing so shall demand, and if possible obtain, a birth certificate, or baptismal certificate, or passport, or any other official or religious record of the minor's age, or duly attested transcript thereof; or, in the event that none of these is obtainable, may accept, in lieu thereof, the record age as given on the register of a school the minor has attended; or, in the absence of such record, may accept the affidavit of the minor's parent, guardian, or other person, which affidavit he is empowered to administer: Provided, That the powers and duties conferred by this section on the superintendents, supervising principals, principal, or secretary of a board of school directors, be and the same are conferred upon superintendents, supervising principals, principal, teachers, or secretaries of any private academy, parochial or denominational schools, in all cases where the applicant for an employment certificate is, or recently has been, an attendant pupil in a private academy, parochial or denominational school, and is not a pupil in a public school: And provided further, That whenever in any school district an employment certificate is issued by any persons other than the public school official hereinbefore directed to issue such certificates in said district, said persons shall, on or before the third day of each month, file with the aforementioned public school official, in said district, true copies of all employment certificates so issued.