Section 7(2)(c) in The Telangana Panchayat Raj (Conduct of Elections) Rules, 2018
(c)A candidate for the office of Member or Sarpanch in a Gram Panchayat or Member in Mandal Praja Parishad or Zilla Praja Parishad, which is reserved, to be filled by a person belonging to the Scheduled Tribes or Scheduled Castes or Women or Backward Classes, as the case may be, shall not be deemed to be qualified to be chosen to fill that seat unless his nomination paper contains a declaration by him specifying the particular tribe or caste or class of which he is a member and the area in relation to which that Tribe or Caste is a Scheduled Tribe or as the case may be, a Scheduled Caste or Backward Class of the State. This declaration shall be made before any Gazetted Officer of the Government or before any Officer of the Revenue Department not below the rank of a Deputy Tahasildar.