Section 2(1)(b) in The Railway Protection Force Act, 1957
(b)“Director-General” means the Director-General of the Force appointed under sub-section (1) of section 4;(ba)“enrolled member of the Force” means any subordinate officer, under officer or any other member of the Force of a rank lower than that of under officer;(bb)“Force custody” means the arrest or confinement of a member of the Force in accordance with rules made under this Act;