Prior intimation to the appropriate Govt to lay off, retrench or close down an establishment is required under the Industrial Disputes Act, 1947 where there are ________ workers

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.