Principal employer - few contractors are not having esic and epf registration

In a factory few contractors are not having esic and epf registration and legally it is not required as the number of workers are below 10.
These are the contractors selected for one time job to cover a project work. How to resolve this as a principal employer. Pls advice.

Principle employer is responsible for payment of ESI and PF, even if it temporary job. If you are paying wages to workmen Management is liable for Payment of ESI and Provident Fund Contributions, if the contractor doesn't have any ESI and PF code number.

Delay payment notice answer of esic department

Hi,
You can give work on "work basis " not on labour basis and accordingly deduct ESIC on labour part ( not material /work)of Work basis bill ,