If your spouse has your "child-in-care" who is under age 16 or who became totally and permanently disabled before attaining age 22, your spouse can be included in the Special Guaranty computation at any age.
A child is in your spouse's care if your spouse exercises parental control over, and is responsible for, the welfare and care of the child. A child who is permanently disabled, but mentally competent, is considered to be "in care" if your spouse performs personal services. The RRB will make the final determination regarding the personal services performed and whether or not they constitute the child being in your spouse's care.