Dear Parag Chatterjee, it is very difficult to answer if you state everything in short form, like ESIC but surprisingly you opted for LDC (Lower Division Clerk I suppose) after serving AirForce for 21 years.Anyway that is something personnel which I have no right to poke my nose in.
As for pay protection YES but only after CONFIRMATION of your employment/service with the present employer.May be they did not CONFIRM you as yet.Kindly ask them if you have completed your PROBATION period which may be maximum ONE YEAR, if not received so far.Sometimes it is your previous employer ( IAF) who do not furnish the necessary information in time to the present employer.Kindly update yourself first.
There is no need to submit any rulings, to ESIC (Which I do not what this ESIC is).It would be done automatically if it is not corrupt as other institutions of my BHARAT.
You can also take the help of RTI but please ensure that your employment with ESIC has been CONFIRMED first.
A little piece of advise please: Militarymen are suppose to chalk out their own strategy instead of depending on others, that is what is taught in the Military.Meanwhile I would try to search the gazette in this connection.