If you're an employer and you provide health insurance for employees and their children, then you will have to provide coverage until the child is 26 years old under the current Affordable Care Act.
A representative from the Department of Labor told a gathering of the San Gabriel Chamber of Commerce told the audience that an employer that allows coverage for children must do so until the child is age 26. That child can be married or living alone and yet the employer must still provide coverage.
I'll have to clarify, but the representative made it sound as though the coverage is mandatory and not optional.
The plan cannot kick a child off at age 22 or 23 like previous policies ma have been able to do.
Of course, the Supreme Court will be ruling on the constitutionality of the law.