Regional Passport Office, Delhi — Educational Proofs

Dear Sir,

I want to apply for passport for my husband, who had only schooling till 6th class and does not hold any certificate to proof his school.
Along with the application for issue of fresh passport I submit his Birth Certificate, Voter I-Card, Ration Card, Pan Card as Date of birth & address proofs.

Please let me know are these enough or any other documents would be required.

Thanks & regards,
JS
New Delhi