CIC needs post school certificates and degrees.
Check the requirement of your local CHC and even if it is required you need to submit photocopy (attested).
Meanwhile you can apply for duplicate copy as well. I had similar case lost my 10th marksheet so applied for duplicate and got it within 2-3weeks.
Good luck
Unfortunately i don't have the photocopy as well. If you have got the duplicate in india. Can you tell me the procedure to get the duplicate mark sheet & how long it takes. When you meant CIC needs post school certificate...in india 12th standard is part of schooling...So will i really need that.