The parent with sole custody can make all decisions about the child independently.
This does not affect the other parent’s right of contact with the child. Only, as long as no access rights have been laid down by the court, the parent with joint custody can refuse access.
The parent without custody is also entitled to information about the child. Again, if the parent with custody refuses to do so, the court may lay down an arrangement.
If the parent with custody is about to move to another country together with the child, the parent with rights of access can ask the court to forbid the move.