Principal employer liability if contractor defaults on EPF payment - If the contractor has their own registration

Dear Seniors & Friends please guide me on below point :-
If contractor submit EPF & ESIC, after its cut off date (15th & 21th of the next month). what is the liability of principal employer.
Is that principal employer liable for delay in payment & could be penalize by dept.

Dear, If contractor submit EPF & ESIC, after its cut off date (15th & 21th of the next month) contractor only has to pay penalty & damage changes. there is no liability on Principal employer.

Dear Chandel Sir,
May I request you abbreviation LWD used in Proforma Statement to be obtained from Contractor stand for
Regards,