title rights and interests may exist over land and waters to the extent that they are consistent with other rights established over the land by law or executive action. According to the National Native Title Tribunal (2013): "The native title rights and interests held by particular Aboriginal people will depend on both their traditional laws and customs and what interests are held by others in the area concerned. Generally speaking, native title must give way to the rights held by others. The capacity of Australian law to recognise the rights and interests held under traditional law and custom will also be a factor... The source of native title is the system of traditional laws and customs of the native title holders themselves." Native title rights and interests may include the right to live in an area or to access it for traditional purposes; to visit and protect sacred sites; to hunt, fish or gather resources; or to teach law and custom. Exclusive possession can only be recognised over certain parts of Australia, such as vacant Crown land, or areas already held by Indigenous Australians. A 2015 review of the Native Title Act by the Australian Law Reform Commission reported that "Courts have indicated that native title is not to be understood in terms equivalent to common law property interests, but they often still tend to draw on these concepts... The prevailing view of the nature and content of native title is hybrid, drawing on traditional laws and customs for content, but also at times idiosyncratically adopting common law terms to describe the nature or character of the rights". It is a complex area of law. The Act continues to be reviewed and amended. Native title determinations The National Native Title Register (NNTR), maintained by the NNTT, is a register of approved native title determinations. A determination can be that native title does or does not exist. As part of the determination of native title, native title groups are required to nominate a Native Title Prescribed Body Corporate to hold (as trustee) or manage (as agent) their native title. Following a determination, Prescribed Bodies Corporate are entered onto the NNTR. At this point, the corporation becomes a Registered Native Title Body Corporate (RNTBC). On 1 July 2011, the 160 registered determinations of native title covered some (approximately 16 per cent) of the land mass of Australia; and registered Indigenous land use