As per our constitution, LABOUR is in the concurrent list, i.e., both the central and state governments can legislate on the subject. The relevant list is as follows:
"23. Social security and social insurance; employment and unemployment."
24. Welfare of labour including conditions of work, provident funds,
employers' liability, workmen's compensation, invalidity and old age pensions
and maternity benefits."
However, we have a convention where the labour subject is discussed in the TRIPARTITE FORUM, i.e., the Indian Labour Conference. Subsequently, necessary legislations are introduced in the parliament. Such acts will be applicable to the whole of India. But the state can amend relevant sections and is also empowered to make rules for the implementation of the act. In every act, the appropriate government is properly defined. Depending on the type of organization, it can easily be clarified. You need to specify the issue, know the relevant act, and find the appropriate government. Please discuss with a couple of people.