20 C.F.R. § 404.968 : Employees' Benefits — SOCIAL SECURITY ADMINISTRATION — FEDERAL OLD-AGE, SURVIVORS AND DISABILITY INSURANCE (1950- ) — DETERMINATIONS, ADMINISTRATIVE REVIEW PROCESS, AND REOPENING OF DETERMINATIONS AND DECISIONS —APPEALS COUNCIL REVIEW — How to request Appeals Council review

(a) Time and place to request Appeals Council review. You may request Appeals Council review by filing a written request. You should submit any evidence you wish to have considered by the Appeals Council with your request for review, and the Appeals Council will consider the evidence in accordance with §404.970.
(1) Within 60 days after the date you receive notice of the hearing decision or dismissal (or within the extended time period if we extend the time as provided in paragraph (b) of this section);
(2) At one of our offices, the Veterans Administration Regional Office in the Philippines, or an office of the Railroad Retirement Board if you have 10 or more years of service in the railroad industry.
(b) Extension of time to request review. You or any party to a hearing decision may ask that the time for filing a request for the review be extended. The request for an extension of time must be in writing. It must be filed with the Appeals Council, and it must give the reasons why the request for review was not filed within the stated time period. If you show that you had good cause for missing the deadline, the time period will be extended. To determine whether good cause exists, we use the standards explained in §404.911.

20 C.F.R. §404.968

81 FR 90994, 1/17/2017