In the first phase, 67 convicts who have served 10 years, in prisons across the state, as on February 25 would be released, an official release said.
The decision had been announced by chief minister K Palaniswami during an MGR birth centenary event at Dindigul in December last.
In accordance with Article 161 of the Constitution, which empowers a Governor to grant pardons and to commute sentences and as per guidelines of the Supreme Court and High Courts on the issue of pre-mature release, two Government Orders were issued.
The GOs, envisage guidelines for the release of prisoners, it added.
Welcoming the move in the assembly, Leader of Opposition, M K Stalin, asked why the announcement was not made in the House since it is in session adding if it was in line with the tradition.
Law Minister C Ve Shanmugam said the release of prisoners, being proposed by the government was a "continuing task," indicating that was why an announcement in this regard was not made in the House.
"Unlike the release of prisoners during your (DMK) regime (2006-11), now it is being done on a case by case basis as per Supreme Court guidelines," he said.
In the Central prisons in the State, committees were set up to give recommendations for remission of sentence, he noted.
Prisoners were being evaluated for release on factors like the length of their detention (if it was 10 or 20 years) in prisons and if they faced serious ailments.
Founder of AIADMK and mentor of late J Jayalalithaa, MG Ramachandran (1917-1987) was Chief Minister of Tamil Nadu between 1977 and 1987.
Tamil Nadu government celebrated his birth centenary year across the state.