Supreme Court held that, the default bail that is available to an accused person u/s 167(2)(a) of CrPC, is part of the fundamental rights available to him/her under Article 21 of Constitution of India.
From Para 28,
A conspectus of the aforesaid decisions would show that so long as an application for grant of default bail is made on expiry of the period of 90 days (which application need not even be in writing) before a charge sheet is filed, the right to default bail becomes complete. It is of no moment that the Criminal Court in question either does not dispose of such application before the charge sheet is filed or disposes of such application wrongly before such charge sheet is filed. So long as an application has been made for default bail on expiry of the stated period before time is further extended to the maximum period of 180 days, default bail, being an indefeasible right of the accused under the first proviso to Section 167(2), kicks in and must be granted.
But then from Para 29,
Bikramjit Singh Vs State of Punjab on 12 Oct 2020…
We must not forget that we are dealing with the personal liberty of an accused under a statute which imposes drastic punishments. The right to default bail, as has been correctly held by the judgments of this Court, are not mere statutory rights under the first proviso to Section 167(2) of the Code, but is part of the procedure established by law under Article 21 of the Constitution of India, which is, therefore, a fundamental right granted to an accused person to be released on bail once the conditions of the first proviso to Section 167(2) are fulfilled.
…
Citations : [(2020) SCC Online SC 824]
Other Sources :
https://indiankanoon.org/doc/10807134/
https://www.indianemployees.com/judgments/details/bikramjit-singh-versus-the-state-of-punjab