Section 10(c) in Tamil Nadu Town Panchayats (Establishment) Rules, 1988
(c)If a qualified and suitable candidate belonging to any of the Scheduled Castes and Scheduled Tribes or Backward Classes is not available for selection for appointment in the turn allotted for them in the cycle, the turn so allotted, to the Backward Classes shall lapse and the vacancy shall be filled by the next turn in the order of rotation; but the turn so reserved for Scheduled Castes and Scheduled Tribes shall, however, not lapse and the number of candidates to be selected in that recruitment shall be reduced by the number of Scheduled Castes and Scheduled Tribes candidates not available for selection against the turn reserved for them; the unfilled vacancies reserved for Scheduled Castes and Scheduled Tribes shall be carried over to the next recruitment; and selection for appointment to the post in the next recruitment shall be made first for the carried over turns and then the normal rotation shall be followed. If qualified Scheduled Castes/Scheduled Tribe candidates are not available even then, the carried over turns shall lapse and the vacancy shall be filled by the next turn in the order of rotation.
