Relevant laws
Laws
EPF Act, 1952 (also see here).
The Industrial Disputes Act, 1947
(The government maintained webpage is not very readable, so you may want to look here.)
The Inter-State Migrant Workmen (Regulation of Employment and Conditions of Service) Act, 1979
The Bonded Labour System (Abolition) Act, 1976
The Unorganised Workers' Social Security Act, 2008 (also see here for rules).
Court Judgements
Liability of employee is on principal employer: Bombay High Court, 2013
(Case number, FA 1134 of 2012, can be found on The judgements information system via search query "CFA1707112")
For a non technical account, you can look at the following news articles:
Economic Times, MoneyLife, Indian Express (all the articles are essentially the same, following a PTI release).
Under Construction. TODO: explain the key provisions in relevance to IITK.