In the absence of MOU, based on your query the point-wise reply to your concerns are as under:-
1 You will be governed by the Contract labour (R&A) Act and the manpower so recruited / engaged will be your employees not only for the purpose of payment of wages and leaves but for all labour laws.
2. As stated above, these employees will be yours and the principal employer will be State Government.
3. Yes, Compliance of EPF and ESIC is to be made subject to the fulfillment of required numbers and implemented areas for ESIC.
4. Please go through the State Notification of minimum wages and in my view their is no relaxation for you and can be prosecuted for violation of minimum wages Act. Even the State Government, being principal employer can also be the party.
P K Sharma
23rd August 2016 From India, Delhi