Section 7(6)(b) in Indian Broadcasting (Programme) Service Rules, 1990
(b)(i)All Officers in the field of promotion to the Junior Time Scale of Programme Production Cadre of either of the two media shall be required to convey in writing their choice in the order of preference for working in any of the specialised discipline in the Programme Production Cadre of the respective media, mentioned in Schedule VII.(ii)The Department Promotion Committee, as specified in Schedule VI, shall, after due consideration of the preference and suitability thereof for acceptance, will recommend the cadre including the discipline) as well as the media in which they shall be appointed on promotion.