1968-1970
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Joint Secretary, Mizo District Congress Committee
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1970
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Nominated Member, Mizo District Council
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1971-1972
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Executive Member, Forest & Revenew, Mizo District Council
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1972-1976
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Member, Mizoram Pradesh Congress Comittee
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1975-78
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Member, Planning Board, Mizoram
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1976-1981
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Treasurer, Mizoram Pradesh Congress Committee
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1978 & 1979
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Member, Mizoram (U.T)Legislative Assembly (Two times)
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1981-1984
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General Secretary, Mizoram Pradesh Congress Committee
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1984-87
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Re-elected to Mizoram (U.T) Legislative Assembly (3rd term)
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1984-1987
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Cabinet Minister, Agriculture, Soil Conservation, Forest, District Council Affairs, Law & Judicial,Govt. of Mizoram(U.T)
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1989-1998
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Member, Mizoram State Legislative Assembly (Two times)
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1989-1993
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Cabinet Minister,Agriculture, Forest, Home, PHE, Excise & Taxation, Govt. of Mizoram
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1993-1998
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Cabinet Minister, Power & Electricity, Food & Civil Supplies, Industries & District Council Affairs, Govt. of Mizoram
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2002-2004
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General Secretary, Mizoram Pradesh Congress Committee
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2008
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Member, Political Affairs Committee and Member of Election Committee, Mizoram Pradesh Congress Committee
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16 May 2009
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Elected to 15th Lok Sabha
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31 Aug. 2009 to 31 Aug 2012
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Member, Standing Committee on Petroleum and Natural Gas
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Member, Consultative Committee, Ministry of Tribal Affairs
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15 Mar. 2010
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Member, Railway Convention Committee
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1 May 2012
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Member, Committees on Welfare of Scheduled Castes and Scheduled Tribes
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31 August 2012
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Member, Standing Committee on Energy
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31 Dec 2012
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Member, Library Committee
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16 May 2014
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Re-elected to 16th Lok Sabha (2nd term)
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1 Sep. 2014 onwards
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Member, Standing Committee on Agriculture
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3 Sep. 2014
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Member, Consultative Committee, Ministry of Tribal Affairs
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1 May 2015 onwards
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Member, Joint Committee on Security in Parliament House Complex
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