| 1991-1997 |
Vice-President, West Bengal Youth Congress |
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Chairman, Legal Cell, West Bengal Youth Congress |
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| 1998 |
General Secretary, West Bengal Trinamool Congress |
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| 2001-2006 |
Member, West Bengal Legislative Assembly |
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| 2007-09 |
Vice-President, All India Trinamool Congress |
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| 2009 |
Elected to 15th Lok Sabha |
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| 31 Aug. 2009 |
Chairman, Standing Committee on Coal and Steel |
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| 16 Sep. 2009 |
Member, Consultative Committee, Ministry of Home Affairs |
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| 23 Sep. 2009 |
Member, Committee of Privileges |
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| 04 Mar. 2011 |
Member, JPC to Examine Matters Relating to Allocation and Pricing of Telecom Licences and Spectrum |
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| 2011 - 2014 |
Chief Whip, AITC Legislative Party, Lok Sabha |
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| 2012-2014 |
Member, Committee on Subordinate Legislation |
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Member, Committee on Ethics |
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Member, Committee on Violation of Protocol Norms and Contemptuous Behavior of Government Officers with Members of Lok Sabha |
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| 2014 |
Re-elected to 16th Lok Sabha (2nd term) |
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| 2014 - 2019 |
Chief Whip, AITC Legislative Party, Lok Sabha |
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| 12 June 2014 - 25 May 2019 |
Member, House Committee |
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| 14 Aug. 2014 - 25 May 2019 |
Member, Committee on Estimates |
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| 1 Sep. 2014 - 25 May 2019 |
Member, Committee on Privileges |
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Member, Standing Committee on Coal and Steel |
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Member, Consultative Committee, Ministry of Law and Justice |
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| 13 May 2015 - 25 May 2019 |
Member, Joint Committee on the Right to Fair Compensation and Transparency in Land Acquisition, Rehabilitation and Resettlement (Second Amendment) Bill, 2015 |
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| 3 July 2015 |
Member, Sub Committee-II, Committee on Estimates |
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| 25 Aug. 2015 |
Member, Sub-Committee of the Committee on Estimates on the subject `Panchayati Raj` |
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| 11 May 2016 - 25 May 2019 |
Member, Joint Committee on the Enforcement of Security Interest and Recovery of Debts Laws and Miscellaneous Provision (Amendment) Bill, 2016 |
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| 11 Jan. 2018 |
Member, Sub-Committee of the Standing Committee on Personnel, Public Grievance, Law & Justice |
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| May 2019 |
Re-elected to 17th Lok Sabha (3rd term) |
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Chief Whip, All India Trinamool Congress Parliamentary Party |
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| 25 June 2019 onwards |
Member, House Committee |
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| 24 July 2019 onwards |
Member, Committee on Estimates |
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| 13 Sept. 2019 - 12 Sept. 2020 |
Member, Standing Committee on Urban Development |
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| 09 Oct. 2019 onwards |
Member, Committee of Privileges |
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| 13 Sept. 2020 onwards |
Member, Standing Committee on External Affairs |
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Member, Consultative Committee, Ministry of Home Affairs |
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| 13 Sept. 2021 onwards |
Member, Standing Committee on Personnel, Public Grievances, Law and Justice |
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