1977-78
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District Secretary, Janata Party, Mangaldai Branch, Assam
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1986-92
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Member, Rajya Sabha
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Deputy Leader, Rajya Sabha
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1986-87
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Member, Consultative Committee, Ministry of Tourism
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1987-89
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Member, Consultative Committee, Ministry of Food and Civil Supplies
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1988-90
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Member, Committee on Rules, Rajya Sabha
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1990-91
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Member, Committee on Subordinate Legislation
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Member, Consultative Committee, Ministry of Home Affairs
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1991-92
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Member, Consultative Committee, Ministry of Petroleum and Natural Gas
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1999
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Elected to 13th Lok Sabha
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13 Oct. 1999
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Union Minister of State, Water Resources
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2009
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Re-elected to 15th Lok Sabha (2nd term)
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31 Aug. 2009
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Member, Standing Committee on Social Justice and Empowerment
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21 Apr. 2010
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Member, Committee on Absence of Members from the sitting of the House
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May, 2014
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Re-elected to 16th Lok Sabha (3rd term)
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1 Sep. 2014 onwards
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Chairperson, Committee on Empowerment of Women
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Member, Consultative Committee, Ministry of Development of North Eastern Region
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1 Sep. 2014 - 18 Oct. 2016
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Member, Standing Committee on Science & Technology, Environment & Forests
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29 Jan. 2015 onwards
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Member, General Purposes Committee
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19 Oct. 2016 onwards
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Member, Standing Committee on Commerce
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