Each tribe has their own policy to determain who is eligible for status. Tribes that have a lower number of members have lowered the requirements to increase the number of "tribal members", this increases the federal $$ allocated to the tribe. Locally, we have a tribe that gave fishing rights to a white man who married a tribal women, under family pressure. It is tribe to tribe. I know the more financially sucessful tribes have increased the requirments to prevent people with 1/4 or 1/8 or 1/32 blood becoming tribal members. For example it would be a lot easier to become an Elwha member than a Tulalip. Check your family history, you just might be eligible to net your favorite river!