Section 16(b) in The Bihar Civil Service (Executive Branch) and the Bihar Junior Civil Service (Recruitment) Rules, 1951
(b)The minimum qualifying marks for candidates belonging to the Scheduled Castes and the Scheduled Tribes shall not be higher than 35% for the Bihar Civil Service (Executive Branch), and 30% for the Bihar Junior Civil Service unless the number of such candidates qualifying at the written test according to the standards applied for other candidates is considerably in excess of the number of candidates required to fill all the vacancies reserved for the Scheduled Castes and Scheduled Tribes:
