In this Act,—
(a)“confinement in a prison”—references to confinement in a prison, by whatever form of words, include references to confinement or detention in a prison under any law providing for preventive detention;
(b)“prison” includes—
(i)any place which has been declared by the State Government, by general or special order, to be a subsidiary jail; and
(ii)any reformatory, Borstal institution or other institution of a like nature;
2[(c) “State Government”, in relation to a Union territory, means the Administrator thereof.]