The Principal Employer (PE) might offer contracts to various service agencies based on the project needs specialization/skills. Permitting subcontracting the job is primarily the duty of the PE; nevertheless, it is the main contractor's responsibility to get a Contract Labour license taking into account the total estimated manpower to be deployed, including the subcontractor/s manpower strength. The main contractor is also responsible for keeping A, B, C, and D registers and filing returns including for subcontractor/s workers.
If there is no express provision in the contract to subcontract the job, all statutory payments must be paid using the primary contractor's PF/ESI Code No. and the employer's contributions must be recovered from the subcontractor/s invoices.
Please note that Form III replaces the former certificate from the principal employer in Form V.
Our friend Mr. Prabhat has already discussed the applicability under the CL(R&A) Act, 1970, and I have simply expanded on a few points.
Regards,
Suresh