The current ESIC exemption limit is 15000 Gross. As per your state rule if any organization have 10 or more employees & if any of the employee's salary is less then 15000 gross Salary, ESIC is applicable. & As per ESIC Act Employee or Employer can not deny to get benefit of the social benefit scheme.
You may search more for this rule on your local website : Employees State Insurance Corporation (ESIC), Kerala - [ http://esickerala.gov.in ]
Hope it will help you.
2nd March 2015 From India, Ahmedabad
2. All employees getting wages( as defined under said Act) upto and including Rs. 15000/ per month are covered under said Act provided the unit is located in implemented area.
2nd March 2015 From India, Noida