Hi Murali..
first u will write a letter to the esi director, regarding this Sub Code, Along with this letter u must submittt 1.Bank Statement of ur Company, 2. If u have any main branch then that company code( C11 ) also submiitt to them or contract agreement if any,., 3. Pan card No, 4. Emp Details, 5. Payslips, 6. Main branch last month challan, 7. Address proff, 8. concern person addres & contact no, who are authorised for that establishment,9.letter heads, .
i hope these are enough, i got code by using this documents... with in 7, 8 days u get the code( sub Code), main code i don't know , how many days will take?
SRIKANTH