(1) No person shall have sexual intercourse
with another person knowingly that such person is one falling within
the prohibited degree of relationship by consanguinity or affinity for
marriage according to the usage, custom or tradition being practiced
in his or her caste or lineage.
(2) A person who commits the offence referred to in subsection
(1) in the following relationship shall be liable to the
following sentence:
(a) A sentence of imprisonment for life in the case of
sexual intercourse between the natural mother
and her natural son or between the natural father
and his natural daughter,
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(b) A sentence of imprisonment for a term of four
years to ten years and a fine of forty thousand
rupees to one hundred thousand rupees in the case
of sexual intercourse between the step-mother
and her step-son, between the step father and his
step daughter, between the full blood elder sister
and brother, between full blood elder brother and
sister, between father-in-law and daughter-in-law
within the same branch, between grand-father and
grand-daughter or great-grand-daughter within
the same branch, between elder brother-in-law
and sister-in-law within the same branch or
between younger brother-in-law and sister-in-law
within the same branch,
(c) A sentence of imprisonment for a term of three to
six years and a fine of thirty thousand to sixty
thousand rupees in the case of sexual intercourse
between grand-mother and her grand-son or
great-grand-son within the three generations of
the same branch, between father's elder brother or
uncle and niece within the same branch, between
nephew and great mother (wife of own father's
brother) or aunty within the same branch,
between father-in-law and brother's daughter-inlaw
within the same branch, between uterine
maternal uncle and niece or nephew and maternal
aunty, between mother's elder sister or younger
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sister and nephew or between mother-in-law
(one's wife side) and son-in-law,
(d) A sentence of imprisonment for a term of one
year to three years and a fine of ten thousand to
thirty thousand rupees, having regard to, inter
alia, the branch, relationship and generation, in
the case of sexual intercourse between persons in
other relationship within seven generations of
one’s own clan except that referred to in clause
(a), (b) or (c).