The government does not supply the agencies with the social security numbers of teenagers reaching the legal age of adulthood. (growingfamilybenefits.com)
In family cases, these are generally child protection cases which may require psychologists to evaluate parents» functional capacities to meet all of the needs of their child (ren) throughout the period of being younger than the legal age of adulthood. (lawyer-monthly.com)
In many western countries 21 was traditionally the age of adulthood. (religion.blogs.cnn.com)