She thanked Prime Minister Narendra Modi for his cabinet approving the state's pending demand.
Jayalalithaa recalled that her government had in 2012 written to the Centre, seeking to implement the Lokur Committee recommendation that Narikoravan, Kurivikkaran and Malayalee Gounder be included in the ST list.
In a statement, she said she had in 2013 wrote to the then Prime Minister Manmohan Singh that Narikoravas should be included in ST list to ensure that the nomadic community lives a life of dignity.
"I thank the Prime Minister for the cabinet approving the demand of the state government, which had been pending for the last few years," she added.