The Railway Protection Force Act,1957
Section 7. Certificates to members of the Force
(1) Every member of the Force shall receive on his appointment a certificate in the form specified in the Schedule, under the seal of the Chief Security Officer or such other superior officer as the Chief Security Officer may specify in this behalf, by virtue of which the person holding such certificate shall be vested with the powers of a member of the Force.
(2) Such certificate shall cease to have effect whenever the person named in it ceases for any reason to be a member of the Force, and, on his ceasing to be a member of the Force, shall be forthwith surrendered by him to any superior officer empowered to receive the same.