Section 174(2) in Haryana Panchayati Raj Act, 1994
(2)If any person is simultaneously chosen as a member of a Gram Panchayat, Panchayat Samiti or Zila Parishad the person shall, within fifteen days from the date of the publication of result, intimate to the State Election Commission the name of Gram Panchayat, Panchayat Samiti or Zila Parishad, as the case may be, in which he wishes to serve and thereupon his seat in the Gram Panchayat, Panchayat Samiti or Zila Parishad other than the one in which he wishes to serve, shall become vacant.