Bharatiya Nagarik Suraksha Sanhita, 2023
Section 301
Definitions
In this Chapter,—
(a) “detained” includes detained 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;
(ii) any reformatory, Borstal institution or other institution of a like nature.
Why this exists
The chapter that follows deals with bringing confined or detained people to court. Defining 'prison' and 'detained' broadly ensures the rules apply not just to standard central or district jails but also to subsidiary jails, reformatories, and youth-focused Borstal institutions, and to people held under preventive detention laws (not just those serving a sentence), so the procedure for producing such people before a court cannot be sidestepped just because they are held somewhere other than a conventional prison.