Section 37(6)(b) in Rajasthan Forest Subordinate Service Rules, 2015
(b)if promotion is from more than one categories of posts carrying different pay scales, eligible persons in the higher pay scale shall be considered for promotion first and if no suitable person is available for promotion on the basis of merit or seniority cum merit, as the case may be, in the higher pay scale than only the eligible persons of other categories of posts in lower pay scales shall be considered for promotion and so on and so forth. The zone of consideration for eligibility in this case shall be limited to five senior most eligible persons in all.