Applicability Of Labour Licence

i want to know that a sub contractor who has 20 or above manpower in construction aria what is the need of license, while the main contractor has license to all worker under which work is carried on but main contractor is not a principle employer . so please suggest me how can i do solve this problem .

Dear Sammanpur
What is the contention of the Principal employer?
As a matter of fact if the Main Contractor obtained the Labour Licence means the sub-contractors also getting covered in the same. The Contractor cannot issue the Form V to the Subcontractors. If the principal employer issues the Form V through the Contractor then only the Subcontractor can apply for the labour licence. Otherwise it is not possible to get the labour licence.