This is one of those cases where the DGCA rules are really convoluted
While Section O of the aircraft Rules 1937 does not require the hours to be done within the last 5 years
Section L i.e CPL with IR requires the hours to be done within the last 5 years
Microsoft Word - Section L.doc
So the DGCA can apply Section L should they wish to. Its better to visit the DGCA in person and get it sorted out or file an RTI in this regard asking which rules would apply incase you wish to endorse an IR on the CPL
Can you tell us why you didnt endorse the IR at the time of applying for CPL ? Because a CPL without an IR is practically useless...