Chennai: Former Election Commissioner T.N. Seshan, who was known for ushering in reforms to ensure free and fair polls, passed away at his residence here on Sunday following cardiac arrest, family sources said. He was 87. An IAS officer who rose to become Cabinet Secretary, Seshan became the 10th Chief Election Commissioner of India after retirement, serving from December 12, 1990 to December 11, 1996. Known for enforcing Model Code of Conduct, Seshan took stern action against any politician who tried to flout its provisions. He was conferred the Magsaysay Prize for Public Service in 1996.