Section 179
Prohibition Of Causing Death By Grave Provocation Or In Heat Of Passion
(1) Notwithstanding anything contained in Section 177 or
178, a person who causes the death of another person in any of the
following circumstances shall be liable to a sentence of
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imprisonment for a term of ten to fifteen years and a fine of one
hundred thousand to one hundred fifty thousand rupees:
(a) Where the offender, while being deprived of the power
of self-control by grave and sudden provocation, causes
the death of the person who gave such provocation,
Provided that this clause shall not apply to the
following circumstance:
(1) Where the offender is provoked by
anything done in obedience to the law or in
the exercise of the right of private defense
or anything done or intended to be done by
a public servant in the exercise of his or her
official duties,
(2) Where the offender himself or herself gives
provocation to another with intent to do
harm to any one and anything done by that
other person upon being so provoked
causes the death of any person.
(b) Where the offender in the exercise in good faith of the
right of private defence exceeds the limit of such power
and causes the death of the person against whom he or
she is exercising such right of private defence,
(c) Where death is caused instantly in the heat of passion
upon a sudden quarrel,
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Provided that while doing any act referred to in
this clause, the offender must not have taken an undue
advantage or acted in a cruel or unusual manner.
(2) Notwithstanding anything contained in clauses
(b) and (c) of sub-section (1), the provisions contained in these
clauses shall not be applicable to any case of murder committed with
premeditation or deliberate afterthought.