The Indian Penal Code (IPC) does not contain any specific provision against incest, but there are general provisions relating to sexual abuse of children by their custodian, such as a parent or teacher.
Punishment is up to 2 decades' (20 years') imprisonment for male offenders and up to 14 years' imprisonment for female offenders.
The law does not cover sexual intercourse with more distant relatives, such as an aunt, uncle, niece, nephew and cousin.
Most laws regarding prohibited degree of kinship concern relations of r = 25% or higher, while most permit unions of individuals with r = 12.5% or lower.
In some US states, cousin marriages are prohibited.
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sexual activity between family members or close relatives) vary considerably between jurisdictions, and depend on the type of sexual activity and the nature of the family relationship of the parties involved, as well as the age and sex of the parties.
Brazil has no criminal punishment if the involved are over the age of 14 (the clear age of consent in force; before 2011, though, sex with people as young as 12 and as elder as 17 was in a legal grey area, with legal guardian-reported sex with those aged 12 and 13 being prosecuted as statutory rape, but unlike as with those aged 11 and younger not directly prosecuted by the State without a report by either the legal guardians or the adolescents themselves – unlike now, where the police forces prosecute all statutory rape-related cases without distinction –, and legal guardian-reported sex with those aged 14, 15, 16 and 17 being prosecuted as corruption of minors, but prosecution as corruption of minors for non-commercial consented sexual activity between people out of a defined hierarchy fell), capable of acting upon their legal rights, and that consent means that the relationship is absent of any kind of coercion or fraud.
First cousin marriages, once fairly common in some regions in the 19th century, are allowed on demand as all other marriages, while avunculate ones (those between uncles or aunts and nephews or nieces), the preferred by some Amazonian Amerindian tribes, and those between half-siblings, are allowed provided that those contracting it have a health check.
Consensual incest between adults is legal in Côte d'Ivoire (Ivory Coast).
Marriage between 3rd degree relatives and beyond is allowed, with the exception of marriage involving lineal ancestors and descendants, which is considered null and void disregarding the degree of separation (parent/offspring, grandparent-grandchild).
Girls below the age of 16 and boys below the age of 13 are deemed to be incapable of giving consent.