SC n case of Mohanlal Shamji Soni v. Union of India and another AIR 1991 SC 1346 has
held that:-
“Section 311 is an almost verbatim reproduction
of Section 540 of the old Code except for the
insertion of the words ‘to be’ before the word
‘essential’ occurring in the old section. This
section is manifestly in two parts. Whereas the
word used in the first part is ‘may’ the word used
in the second part is ‘shall’. In consequence, the
first part which is permissive gives purely
discretionary authority to the Criminal Court and
enables it ‘at any stage of enquiry, trial or other
proceedings’ under the Code to act in one of the
three ways, namely,
(1) to summon any person as a witness, or
(2) to examine any person in attendance,
though not summoned as a witness, or
(3) to recall and re-examine any person already
examined.
8. The second part which is mandatory imposes
an obligation on the court —
(1) to summon and examine, or
(2) to recall and re-examine any such person if
his evidence appears to be essential to the just
decision of the case.
9. The very usage of the words such as ‘any
court’, ‘at any stage’, or ‘of any enquiry, trial or
other proceedings’, ‘any person’ and ‘any such
person’ clearly spells out that this section is
expressed in the widest possible terms and do not
limit the discretion of the court in any way.
However, the very width requires a corresponding
caution that the discretionary power should be
invoked as the exigencies of justice require and
exercised judicially with circumspection and
consistently with the provisions of the Code. The
second part of the section does not allow for any
discretion but it binds and compels the court to
take any of the aforementioned two steps if the
fresh evidence to be obtained is essential to the
just decision of the case.”
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