In case of employee covered under the ESI, the accident report shall be sent in _______ to Local office of the ESI to which the company's attached

Industrial relations is about the relationship between the administration and the employees of an organization at the workplace. 
Minimum Wages Act, 1948, Factories Act, 1948, Maternity Benefits Act, 1961, Payment of Bonus Act, 1965 are some important labor laws in India.