Is ESIC payment mandatory upon registration of Proprietary Concern under ESI Act

Earlier there was a partnership Firm of AB&C- then they transferred to Mr.D as a Proprietary Concern. This resulted in Mandatory Registration under ESI Act.
Being not eligible for ESIC, is it required to pay mandatory after being Registered under said act.
Is there any way out from it?
ASAP Reply would be appreciated.

if AB&C have closed down their business, then they must have got all employees resigned, and informed the ESIC / EPFO about the incident, they must had submitted the dissolution deed of partnership to the concerned departments, and made their employees EXIT from the respective portal
now Mr D is not part of AB&C, who is a proprietary concern and have no relation, with AB&C or their employees, then he is not eligible unless the manpower exceeds ten in proprietary firm
but if Mr D has acquired assets and liabilities of AB&C and their trade name also, then they have considered the employees back period liabilities also, and would have to maintain all respective laws of AB&C