age 18
see links
13
14 years of age
age 18 see links
A child can make that decision at the age of 18.
See Link Below'Child Refusing To Visit Other Parent?'
see link
Minors are not responsible for those decisions. The custodial parent is responsible and is the one who will be held accountable by the court. The children don't get to decide that they can disobey a custody agreement at any age.
Maybe.
see link
see related link
Generally, not until the child is 18.
When they are 16, that is also when they can move out if they have a good place to stay.