Section 28(7)(a) in The Rajasthan Women and Child Development (State and Subordinate) Service Rules, 1998
(a)The Committee shall consider the cases of all the senior most persons who are eligible and qualified for promotion to the class of posts concerned under these Rules and shall prepare a list containing names of the persons found suitable on the basis of seniority-cum-merit and/or on the basis of merit, as the case may be, as per the criteria for promotion laid down in these Rules, equal to the number of vacancies determined under rule relating to "Determination of vacancies" of these Rules. The list so prepared on the basis of seniority-cum-merit and/or on the basis of merit, as the case may be, shall be arranged in the order of seniority in the category of posts from which selection is made.