20 C.F.R. § 404.949

You or a person you designate to act as your representative may appear before the administrative law judge to state your case, present a written summary of your case, or enter written statements about the facts and law material to your case in the record. If presenting written statements prior to hearing, you must provide a copy of your written statements for each party no later than 5 business days before the date set for the hearing, unless you show that your circumstances meet the conditions described in § 404.935(b).

[81 FR 90993, Dec. 16, 2016