In Irvine family law and throughout California, a child becomes an adult when either one of the two below occurs:
A child reaches the age of 18 and has graduated from high school, OR
A child reaches the age of 19
When a child becomes an adult, the court loses jurisdiction over the child as it relates to child custody and visitation and child support, unless special circumstances are present.
Under limited circumstances, child support can be extended beyond emancipation to otherwise become known as adult support for a child who is incapacitated from earning a living and without sufficient means.