Factory License requirement for Gujarat state - if work at principal employer premises

Dear Team, Good Morning, I have one query regarding the Factory license.
Suppose one person does work at principal employer premises then he requires to take a factory license?

Your question is not understood from your description provided. Why this question aroused in you mind creates confusion. You need to provide more information i.e. what machine & tools will be used, power consumption, Maximum number of person will work on a day, whether the establishment of PE is a factory or non-factory?, volume of work and duration of work.
Your Q: Suppose one person do job work at principal employer premises then he requires to take factory license ? Ans: No

Dear Pulkit,
Your query is incomplete and therefore you may end up getting wrong answers. Please always give the full details and backgrounds on your questions.
If i get the question correct, if you have your employees working in someone's factory as contract workers, you do not need a separate factory license. You however, will need contract labour license.
However, if you have leased the place where your employees are working, and the work is independent of the main factory. Then probably you need a separate license.

Factory license is needed if you are undertaking a manufacturing activity with the aid of power and having 10 or more workers or otherwise 20 or more workers. You have stated one person to be working in the premises of someone else, is he a self-employed contractor, but at any rate, the occupier of the factory premises has to take Factory License subject to the above preconditions.