Section 4(1)(c) in Bihar Police Sub-ordinate Services Commission Rules, 2017
(c)Department shall nominate maximum 2 (Two) Members, not below the rank of Joint Secretary, from other departments such as, Home Department, Environment and Forest Department, Registration, Excise & Prohibition Department, Transport Department and Disaster Management Department. At least one member shall be from Scheduled Caste/Scheduled Tribe in the said Members.