What is the age define for a son or daughter to be covered on condition insurance?

Several years ago I recall the word reporting that children could be carried on their parents' health insurance through age 25 short proof that they were a student. My son is a student, but I am still trying to find the statute.
It's not the law it's usually up to your insurance mover. My parents were competent to insure me as long as I was a full time student they covered me until I be 24 and graduated from college. Once I not here school I be off of their policy.

Call your insurance mover and ask them.
I'm insured underneath my mother's insurance with Cigna and I am 23. I be told that as long as I am under 24 I can verbs to be insured under her policy. Other insurances own the same policy as long as you show proof that he/she is contained by college. There is no "law" that says this, insurance companies enjoy the right to make their own regulations and rules nearly who or when to insure a person. There's no blanket answer. There's no "law". Each insurance company is allowed to form it's own rule.

Generally, most cease when the child turns 19 if he's not within school full time, or 23 if he is contained by school full time, unless you've get a severely handicapped child (like downs syndrome) who can be kept on your plan forever.

Bottom line - you hold to read your policy.
I believe it is age 18.
In Maryland, there is a imperative allowing children to keep their parent's insurance [excluding federal employees'] until 21. It depends on the insurance company. I'm on my dad's insurance until I am 25 as long as I'm a student. And we hold to prove that I'm a student each fresh semester.
There is no such law. It is up to the strength insurer. Most employer policies set a limit of 23 (with proof of student) beside an unlimited age if your child is completely and totally disabled and needs you as a subscriber for ALL his/her support. I suggest it is 22 years, but it may depend on you health insurance provider. Health insurance and man a student do not change the result of the insurance company.

Answers:   There is no national law, and most states don't hold such a law any.

At least one state does own the type of law you are describing...however, even later there are restrictions on that coverage.

For example, surrounded by New Jersey, according to state law a dependent can be vanished on the plan until age 30 if he/she meets in no doubt criteria. Here are the requirements, from New Jersey's Department of Insurance website: http://www.state.nj.us/dobi/dependentsun...

I thought I recalled audible range about a similar ruling for West Virginia, but a quick scrabble online didn't turn up anything.

You didn't mention what state you live in, but almost every state have no such law. So, its predictable that you're out of luck. The student requirement is up to each employer to negotiate when they establish their benefit plan, and the rules for your benefit plan should be pretty cut and dry.
It is not a law. Check your insurer's policy.