Dear Ashok Kumar.
I would recommend that you subscribe for life subscription to UZHAIPPAVAR ULAGAM. The fee is very nominal, should be around Rs.750/- for 20 year subscription. It is a monthly magazine in Tamil and updates you on the various happening on case laws, minimum wages, cost of living index, queries and answers, informative articles etc., The details can be obtained from the Labour office complex in Teynampet, opposite to Congress grounds.
Regards
M.V.KANNAN