Since the original post does not provide the details, it is not possible to definitely state that they are not covered under the act.
27th May 2015 From India, Mumbai
Almost all the labour laws are normative, benefits / facilities you extend should not be less favourable than those stipulated in respective Acts.
29th May 2015 From India, Mumbai
So, there is nothing in the rules that says labour is Manuel work or anything to do with the factory. Every person who is on a contract, irrespective of what work he's doing, including highly skilled engineering people, are covered.
So, you need to register and the contractor needs to get a license
30th May 2015 From India, Mumbai