Pro Rata is the term used to describe a proportionate allocation. It is a method of assigning an amount to a fraction according to iits share of the whole. It is calculated as per the Government pension rules. The pro rata pension is paid by the government as per rule 37 of central civil services pension rules 1972 and as amended from time to time.
This policy was also made applicable only to commissioned officers of Defence services and not to personnel below officer rank (PBOR) of the defence services.