There is no limit to the number of children in a family membership.
Unmarried adult children may be part of their parent's membership until age 26.*
It is the responsibility of the member to notify Impact when an adult child no longer qualifies as part of the Member Household. Continuing to submit the Monthly Shares at the level that included the adult child does not extend the membership.
*An exception is adult children 26 and older who are severely disabled and unable to live or work outside a special environment; who are still dependent upon and under the care of their parent(s).