At the outset, I must appreciate Sh. Umakanthan, who has nicely explained the position with regard to your query. Since the query has been raised from Lucknow (U.P.), the U.P. Shops and Commercial Establishments Act shall be made applicable in your case.
Definition of Employer
As per Section 2(7) of the Uttar Pradesh Dookan Aur Vanijya Adhishthan Adhiniyam, 1962, the "Employer" has been defined as a person who owns or who holds charge of, or has ultimate control over the trade, business carried on in a shop or commercial establishment, as the case may be, and includes any other person acting on behalf of the employer in the management or control of such trade, business. As such, you are required to take registration (not the license) from the state labour department by paying the prescribed fee.
I would like to point out that there is no concept of Principal Employer or Form IV as mentioned by Sh. Grpadmasekhar in this case.
Regards,
BS Kalsi
Member since Aug 2011