Section 479 BNSS: Maximum Period for Which an Undertrial Prisoner Can Be Detained
Section 479 of the Bharatiya Nagarik Suraksha Sanhita, 2023 limits prolonged pre-trial detention and creates specific release thresholds for eligible undertrial prisoners, including a more beneficial rule for first-time offenders.
Section 479 at a glance
- General rule: an eligible undertrial who has undergone detention up to one-half of the maximum imprisonment specified for the offence shall be released on bail.
- First-time offender: a person who has never been convicted of any offence in the past shall be released on bond after detention up to one-third of the maximum imprisonment specified for the offence.
- Excluded offences: the principal benefit does not apply where death or life imprisonment is specified as one of the punishments for the offence.
- Delay caused by accused: detention attributable to delay in the proceeding caused by the accused is excluded while computing the qualifying period.
- Jail Superintendent: on completion of the applicable one-half or one-third period, the Superintendent must make a written application to the Court for action under Section 479(1).
What does Section 479 BNSS mean?
Section 479 is a statutory safeguard against an undertrial prisoner remaining in custody for an excessive period before conclusion of investigation, inquiry or trial. It fixes custody thresholds by comparing the period already spent in detention with the maximum term of imprisonment prescribed for the offence.
The provision is part of Chapter XXXV of the BNSS dealing with bail and bonds. The Bharatiya Nagarik Suraksha Sanhita, 2023 came into force on July 1, 2024, subject to the notified exception concerning the First Schedule entry relating to Section 106(2) of the Bharatiya Nyaya Sanhita, 2023.
Section 479 BNSS - statutory text
479. Maximum period for which under trial prisoner can be detained.
(1) Where a person has, during the period of investigation, inquiry or trial under this Sanhita of an offence under any law (not being an offence for which the punishment of death or life imprisonment has been specified as one of the punishments under that law) undergone detention for a period extending up to one-half of the maximum period of imprisonment specified for that offence under that law, he shall be released by the Court on bail:
Provided that where such person is a first-time offender (who has never been convicted of any offence in the past) he shall be released on bond by the Court, if he has undergone detention for the period extending up to one-third of the maximum period of imprisonment specified for such offence under that law:
Provided further that the Court may, after hearing the Public Prosecutor and for reasons to be recorded by it in writing, order the continued detention of such person for a period longer than one-half of the said period or release him on bail bond instead of his bond:
Provided also that no such person shall in any case be detained during the period of investigation, inquiry or trial for more than the maximum period of imprisonment provided for the said offence under that law.
Explanation. In computing the period of detention under this section for granting bail, the period of detention passed due to delay in proceeding caused by the accused shall be excluded.
(2) Notwithstanding anything in sub-section (1), and subject to the third proviso thereof, where an investigation, inquiry or trial in more than one offence or in multiple cases are pending against a person, he shall not be released on bail by the Court.
(3) The Superintendent of jail, where the accused person is detained, on completion of one-half or one-third of the period mentioned in sub-section (1), as the case may be, shall forthwith make an application in writing to the Court to proceed under sub-section (1) for the release of such person on bail.
One-half detention rule
For an undertrial who is not within the special first-time-offender category, Section 479(1) provides release on bail after detention extending up to one-half of the maximum imprisonment prescribed for the offence, provided the offence is not one for which death or life imprisonment is specified as one of the punishments.
One-third rule for a first-time offender
The first proviso gives additional protection to a first-time offender, defined in the section as a person who has never been convicted of any offence in the past. Such a person shall be released on bond after undergoing detention extending up to one-third of the maximum imprisonment specified for the offence.
| Category | Statutory threshold | Form of release stated in Section 479 |
|---|---|---|
| First-time offender | Up to one-third of maximum imprisonment | Release on bond |
| Other eligible undertrial | Up to one-half of maximum imprisonment | Release on bail |
Can the Court keep an undertrial in custody beyond one-half of the maximum term?
Yes, but only within the limits stated in the section. The second proviso permits continued detention beyond one-half after hearing the Public Prosecutor and recording reasons in writing. The same proviso also permits release on bail bond instead of bond. The third proviso states that an eligible person cannot in any case be detained during investigation, inquiry or trial for more than the maximum imprisonment prescribed for the offence.
How is the detention period calculated?
The Explanation to Section 479 directs that any period of detention attributable to delay in the proceeding caused by the accused must be excluded while calculating the period for the purpose of release under the section.
What happens if multiple offences or multiple cases are pending?
Section 479(2) contains a specific non-obstante rule. Subject to the third proviso to sub-section (1), where investigation, inquiry or trial in more than one offence or in multiple cases is pending against a person, the person shall not be released on bail by the Court under this section.
Duty of the Jail Superintendent
Section 479(3) places an affirmative duty on the Superintendent of the jail. Once the detained person completes the applicable one-half or one-third period, the Superintendent must forthwith make a written application to the Court so that the Court can proceed under Section 479(1).
Supreme Court implementation
The Supreme Court has directed implementation of Section 479 for eligible undertrial prisoners and has clarified that the beneficial provision applies to undertrials in pending cases irrespective of whether the case was registered before July 1, 2024. The Court also emphasized identification of eligible prisoners through Undertrial Review Committees and coordination with Jail Superintendents.
Section 479 BNSS and old Section 436A CrPC
Section 479 performs the role previously associated with Section 436A of the Code of Criminal Procedure, 1973, while introducing the express one-third detention threshold for first-time offenders and a statutory duty on the Jail Superintendent to move the Court when the relevant threshold is reached.
Practical points for an application under Section 479
- Identify the maximum imprisonment prescribed for the offence or offences involved.
- Calculate the total period actually spent in detention during investigation, inquiry and trial.
- Exclude delay attributable to the accused where the statutory Explanation applies.
- State whether the accused is a first-time offender within the meaning of the first proviso.
- Check whether death or life imprisonment is specified as one of the punishments for the offence.
- Check whether more than one offence or multiple cases are pending, because Section 479(2) specifically addresses that situation.
- Place the custody calculation and relevant prison record before the Court.
Legal note
This page explains the statutory provision for general information. Bail entitlement can depend on the precise offence, custody computation, number of pending offences or cases, orders already passed, and other applicable special laws.