 The person won't be charged a registration fee, may use the postnominal abbreviation "MBoS," and may request at any time to cancel or change the registration.A person is eligible to register a descendant membership with the group if he or she is otherwise eligible to register a membership and proves beyond doubt his or her descent from or relationship to one or more participants of the trials with lineages showing detailed descendancy.The person won't be charged a registration fee, may use the postnominal abbreviation "DBoS," may request at any time to cancel or change the registration, and must include proof of parentage for each generation, beginning with his or her own, so that the person named first in a generation was a child or relative of the couple named in the following generation.