No later than 90 days after a tribe submits an ordinance for approval under Sec. 522.2 of this part, the Chairman may disapprove an ordinance if he or she determines that a tribe failed to comply with the requirements of Sec. 522.2 or Sec. 522.4(b) of this part. The Chairman shall notify a tribe of its right to appeal under part 524 of this chapter. A disapproval shall be effective immediately unless appealed under part 524 of this chapter.