If Native American tribes don't change their current tribal membership requirements, what could happen in the future? If Native American tribes don't change their current tribal membership requirements, what could happen in the future? 1-Some tribes may face challenges as more and more members move to reservations.2- The number of individuals claiming membership may increase sharply. Some tribes may cease to exist due to decreasing numbers of full-blooded members.3- They may no longer be eligible to receive federal aid