Hi Pardeep,
Yes, it's applicable. The then 'Workmen Compensation Act 1923 has been renamed as the 'Employees Compensation Act'. Under this establishments covered are stipulated in the 'Definitions' clause 2 of the Act which reads as follows:
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THE EMPLOYEE’S COMPENSATION ACT,1923
[as amended through EC(Amendment)Act,2017]
PREAMBLE.-
An Act to provide for the payment by certain classes of employers to their *[Employees] of compensation
for injury by accident.
Whereas it is expedient to provide for the payment by certain classes of employers to their workmen of
compensation for injury by accident;
It is hereby enacted as follows:--
1. Short title, extent and commencement.-(1) This Act may be called the *[Employee's] Compensation
Act, 1923.
(2) It extends to the whole of India .
(3) It shall come into force on the first day of July, 1924.
2. Definitions.- (1) In this Act, unless there is anything repugnant in the subject or context,--
(e) "employer" includes anybody of persons whether incorporated or not and any managing agent of an employer and the legal representative of a deceased employer, and, when the services of a *[employee] are temporarily lent or let on hire to another person by the person with whom the *[employee] has entered into a contract of service or apprenticeship, means such other person while the *[employee] is working
for him;
(f) "managing agent" means any person appointed or acting as the representative of another person for the
purpose of carrying on such other person's trade or business, but does not include an individual manager
subordinate to an employer;
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Also for your immediate ref. the full text of the act is attached which will be handy to you in implementing its provisions together with amendments issued from time to time.