Section 28A(2) in The Rajasthan Police Service Rules, 1954
(2)The persons enumerated in Column 5 or the relevant column regarding post from which promotion is to be made, as the case may be, of the relevant Schedule shall be eligible for promotion to posts specified against them in Column 2 thereof to the extent indicated in Column 3 subject to their possessing minimum qualification and experience on the first day of the month of April of the year of selection as specified in column 6 or in the relevant Column regarding minimum qualification and experience for promotion, as the case may be.Provided that for first promotion in the Service if number of persons substantively appointed and confirmed on the lowest post, equal to the number of vacancies are not available then persons who have been appointed to the lowest post in the Service after selection in accordance with one of the methods of recruitment prescribed under these rules, shall also be eligible if they fulfill other conditions of eligibility.