Registers under Inspector of Factories Act - to be maintained for Employees as well as contract workers?

JCV2012
As per the Inspector of Factories Act compliances, we need to maintain Form 12, Form 15 & Form 25. As per one of the Inspectors at DISH in Chennai, these registers need to be maintained for Employees as well as contract workers. Can someone clarify if this is the case?
Thank you
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