It really just depends on the circumstances and you insurance companies underwriting guidelines.
If the 23 year old still lives at home and drives your vehicle(s), then most of your local insurance companies will have no problem with this.
If the 23 year old has a separate residence and has his/her own vehicle then you are no longer considered to have a financial interest that vehicle or their insured status. You can not insure property when you have no insurable interest.
Additionally many of the larger national standard carriers have internal rules that require your child to buy their own policy at a certain age. The company underwriting guidelines just prohibit you adding them after a certain age. This is not a legal matter but a business decision and marketing strategy on the part of the insurance company. At a certain age they want your child to get his own separate policy so the Insurance Company can begin to foster a separate relationship with them as new client.
Call a licensed life insurance agent
You should be able to officially exclude yourself from coverage if your state laws allow for that.
No. However, you can obtain coverage as a supplement ( called a rider ) to your parents' insurance policiy.
yea
You may need to get your insurance company to add the new driver on with a rider clause to be covered. It is possible that your coverage will allow the new driver, but, some insurance companies do not allow new drivers to be on the parents insurance, They make the new driver get an insurance policy on his or her license before they will cover them in the parents car. Check with your agent before you let the new driver operate the vehicle alone or you may loose your insurance.
You have to be either named or you have to fit the definition of a named insured on the policy.
Yes, if you have their permission, are a licensed or permitted driver, and are covered by insurance and the vehicle is properly licensed and working.
You don't have to live there as long as you are listed on the policy.
You must either have a driver's license or be insured under a licensed driver's insurance. If you are a minor, your parents can add you to their car insurance.
You do not have to live with them as long as you are listed on the policy.
No, but there are licensing requirements.
As soon as the insurance company gets wind that you are married they will drop you from their coverage. If you are caught using their insurance they will probably try to charge you with fraud or cancel your parents insurance.