The below BIA created
Blood Quantum calculation chart is used by the BIA to calculate a persons degree of Indian blood, issuance
of a BIA certified CDIB (Certificate of Degree of Indian Blood). Also, may be used by various Indian Tribal
goverments for enrollment into that Tribe.
"What is the
Background of the Federal Acknowledgment Regulations
'The BIA sets no minimum
blood quantum requirement for acknowledgment purposes, but does require descent from a historic tribe. If your group
decides to establish a blood quantum requirement for membership, that is your own decision. However, it is not required
by the acknowledgment regulations."
above quote copied from, Code
of Federal Regulations 25- Indians, Bureau of Indian Afairs of the Department of the Interior.