Its not compulsory to renew the IR in order to the renew the CPL
The renewal skill tests of day and night can be done on any aircraft endorsed on the license
The only requirement for renewal of FRTOL is a valid RT and valid class 1 medical
You can renew this along with the CPL
But at the time of giving the skill tests both RT and FRTOL should be valid
ELP is not automatically renewed . You have to take the test again . If its expired take the test again , endorse it again on the CPL and only then do the skill tests ( otherwise DGCA will raise an objection saying renewal done without valid ELP )
Normally takes 2 weeks to renew the licenses at the DGCA Regional office