Section 28(7)(b) in Rajasthan Rural Development and Panchayati Raj State and Subordinate Service Rules, 1998
(b)in the Service or groups or Sections thereunder, where there are three scales e.g., junior scale, senior scale and selection scale and there are two promotions then promotion shall be as under(i)first promotion on the basis of seniority-cum-merit;(ii)second promotion on the basis of seniority-cm-merit and merit in the proportion of 50:50;