25 C.F.R. § 83.8 : Indians — BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR — TRIBAL GOVERNMENT — PROCEDURES FOR FEDERAL ACKNOWLEDGMENT OF INDIAN TRIBES — GENERAL PROVISIONS — May the deadlines in this part be extended?

(a) The AS-IA may extend any of the deadlines in this part upon a finding of good cause.
(b) For deadlines applicable to the Department, AS-IA may extend the deadlines upon the consent of the petitioner.
(c) If AS-IA grants a time extension, it will notify the petitioner and those listed in §83.22(d).

25 C.F.R. § 83.8

80 FR 37887, 7/1/2015