All Nauruans belong to a matrilineal group or clan. Each birth and death is publically identified by clan affiliation in a public document. That affiliation lasts the lifetime of the individual and is not altered by marriage. A marriage partner must be selected
from another clan. Marriage today is largely a Christian affair, though there are concerns that some young people are opting not to marry; their children belong to the mother's lineage. Households center on the mother, who takes care of and then is cared for by her children. The nominal head of the household is the male, but the decision-making head is the mother, who is largely responsible for economic management as well as social care. Land and other properties are inherited by both sons and daughters, but only daughters can pass on their rights to their children without seeking extended family consent. Modern properties such as motor-bikes are passed on within extended families. All Nauruans belong to a district. That affiliation is inherited through the mother or father but may be changed during a person's lifetime for political reasons. District affiliation includes responsibility for participating in district activities.