Dear Mr. Vighnesh,
As far as I understand, you are seeking information regarding labor law compliance. However, it is unclear whether the persons are employed by the contractor or the company itself on its roll.
Assuming that you are a manufacturing company employing 50 persons, the following legislations are applicable, to say the least:
1. PF - Register with PF Office and ensure PF compliance.
2. ESIC - Generate an ESIC Code as Sanaswadi falls in Implemented Areas.
3. MLWF (Maharashtra Labour Welfare Fund) - Register your establishment and make nominal contributions per employee on a half-yearly basis.
4. Factories Act - Make a Statutory Declaration to the Inspector and obtain the factory layout's sanction.
5. Profession Tax - Registration and monthly compliance.
If you need any further assistance, please feel free to get in touch with me.