Section 24B(7)(a) in The Rajasthan Co-Operative Service Rules, 1954
(a)in a Service [x x x] [Deleted by F. 1(17) DOP/A-II/84, 5-11-84] where there are only two scales e.g. junior scale or senior scale and there is only one promotion then promotions shall be made on the basis of seniority-cum-merit alone;