| (a) | - | is by reason of sickness or infirmity unfit to be removed from the prison; or |
| (b) | - | is under committal for trial or under remand pending trial or pending a preliminary investigation; or |
| (c) | - | is in custody for a period which would expire before the expiration of the time required for complying with the order and for taking him back to the prison in which he is confined or detained; or |
| (d) | - | is a person to whom an order made by the State Government under section 268 applies, |