Definition of 'Appropriate Government'
The definition of 'Appropriate Government' holds the answer to your query. The Act defines 2 (b) "appropriate Government" as follows:
(i) In relation to any scheduled employment carried on by or under the authority of the Central Government or a railway administration, or in relation to a mine, oilfield, or major port, or any corporation established by a Central Act, it is the Central Government.
(ii) In relation to any other scheduled employment, it is the State Government.
So, concerning most industries except railways, mines, oilfields, major ports, and corporations like LIC, it is the State Government. If you have any specific unit in mind, please provide more details for further advice.