* Specific Institution/Program: Each college, university, scholarship program, or other educational opportunity has its own criteria. Some might use tribal enrollment as the primary determinant, while others might consider self-identification alongside supporting documentation. Some programs might prioritize students with a higher degree of documented ancestry, while others focus on tribal affiliation regardless of the percentage of blood quantum.
* Tribal Affiliation: Many programs prioritize students who are enrolled members of a federally recognized tribe. Enrollment requirements differ between tribes.
* Blood Quantum: The concept of "blood quantum" (the fraction of a person's ancestry that is Native American) is a complex and often controversial system. While some programs might consider it, many are moving away from this as a sole criterion due to its historical injustices and the inaccuracies of determining ancestry.
* Supporting Documentation: Proof of tribal affiliation, enrollment status, or ancestry might be required. This could include tribal enrollment cards, genealogical records, or other documentation.
In short, there's no magic number. You need to research the specific requirements of each educational opportunity you're applying for. Contact the institution or program directly to inquire about their eligibility criteria for Native American students.