Section 7(6)(c) in Indian Broadcasting (Programme) Service Rules, 1990
(c)(i)All candidates appearing for competitive examination for appointment to the Service shall like wise be required to indicate in writing their choice in the order of preference for appointment in the Programme Management Cadre or in the Programme Production Cadre of either or the two media to which they would like to be considered for appointment in case they are selected.(ii)At the time of making appointments, on the basis of the position and rank obtained by the candidates in the Examination, the preference expressed by them in respect of the medium and the cadre shall be given due consideration :