Indigenous peoples of Australia comprise two groups with very different histories, ethnicities and customs:
Aboriginal peoples and
Torres Strait Islanders. Torres Strait Islanders are "strictly monogamous [and] mostly church-married". The most notable customary practice differing from usual practice among non-Indigenous Australians is that of adoption, known as
kupai omasker, by members of the extended family or friends. The reasons differ depending on which of the many Torres Islander cultures the person belongs to. Most studies have looked exclusively at Aboriginal law and lore, with regard to personal and social customs. Indigenous customary law is not uniform across Australia, and systems differ greatly between
language groups, clans, and regions. Within some Aboriginal Australian communities, the words "law" and "lore" are words used to differentiate between the Indigenous and post-colonial legal systems. The word "law" is taken to refer to the legal system introduced during the
European colonisation of Australia, whereas the word "lore" is used to refer to the Indigenous customary system. Learned from childhood, lore dictates the rules on how to interact with the land,
kinship, and community. Aboriginal customary lore is intertwined with cultural customs, practices, and stories from the
Dreamtime. Customs are passed on through the generations by means of cultural works such as
songlines, stories and dance. Those cultural works are passed on by
oral tradition. A report by the
Australian Government in 1986 did not find any codified versions of Indigenous customary lore, but acknowledged that the existing knowledge of Indigenous Australian traditions may be sufficient to be considered as such. In some cases the condemned could be denied mortuary rites. == Recognition by the colonial legal system ==