Section 167(2) is built around a trade-off: the more serious the offence, the more time a fair investigation genuinely needs, but personal liberty still cannot be held hostage forever. Reading the options against this trade-off, rather than trying to recall a single number, gets to the answer.
- Upon the expiry of 120 days specifically for offences against the State: The trade-off the section strikes tops out at 90 days even for the gravest offences carrying death or life imprisonment; there is no separate, longer 120-day allowance carved out for offences against the State specifically.
- After 60 days or 90 days, contingent upon the maximum punishment prescribed for the offence: This is exactly the balance the section strikes, graver offences, death, life imprisonment, or ten years and above, get the longer 90-day investigation window, while all other offences get the shorter 60-day window, after which liberty prevails and default bail becomes available.
- Immediately following the completion of the initial 15-day police custody: The 15-day custody period is about how long a person can be held with the police specifically for interrogation, a different and much narrower concern from the overall outer limit on investigation before default bail kicks in.
- After a fixed period of 30 days for all types of offences: A single flat period regardless of offence gravity would abandon the trade-off entirely, either being too short for serious crimes needing real investigation time, or too long for minor ones where liberty should prevail sooner.
Balancing investigation needs against personal liberty exactly as Section 167(2) does confirms that default bail arises after 60 or 90 days depending on the offence's maximum punishment.