Section 23(4)(iii) in The U.P. Entertainment and Betting Tax Inspectors Service Rules, 1982
(iii)Where in accordance with the rules or prescribed procedure, the unfilled vacancies from any source could, in the circumstances mentioned in the relevant rule or procedure be filled from the other source and appointment in excess of quota and so made, the persons so appointed shall get the seniority of that very year as if they are appointed against the vacancies of their quota.