1. Sir, I will suggest you to please read necessary literature, viz. ESI Act, 1948 and rules, regulations framed thereunder and also the material on social security. You can download some of material from the website of ESIC.
2. After going through all such material, if still you have any doubt, you can raise in this cite by indicating the doubts or clarifications in brief. ESIC and social security is a vast subject, and it is difficult to indicate the same in a para or in few paras.