; (II) is the custodial spouse of the beneficiary for whom the person applies to serve; (III) is the custodial parent of a beneficiary who is under a disability which began before the beneficiary attained the age of 22, for whom the person applies to serve; (IV) is the custodial court appointed guardian of the beneficiary for whom the person applies to serve; (V) is the custodial grandparent of a minor grandchild for whom the person applies to serve; (VI) is the parent who was previously representative payee for his or her minor child who has since turned 18 and continues to be eligible for such benefit