To everyone applying for an Instrument rating after obtaining the CPL ( assuming this is your first Instrument rating )
The DGCA has a new problem. As you all know that DGCA papers for issue of initial license like PPL , CPL and ATPL is valid for 5 years. For any further endorsements the papers are
valid for only 2.5 years Read 6.6
http://www.dgca.nic.in/cars/D7B-B1.pdf
So after obtaining the CPL if you need Instrument rating the DGCA requires candidates to have passed Air Nav , Air Regs and Met papers within the last 2.5 years
A few files seeking application of IR after CPL issue is now are stuck in the DGCA due because of this rule.