44 C.F.R. § 208.65 Mode of transmission.
Title 44 - Emergency Management and Assistance
When sending all submissions, determinations, and requests for supplemental information under this subpart, all parties must use a means of delivery that permits both the sender and addressee to verify the dates of delivery.
Title 44: Emergency Management and Assistance
PART 208—NATIONAL URBAN SEARCH AND RESCUE RESPONSE SYSTEM
Subpart D—Reimbursement Claims and Appeals
§ 208.65 Mode of transmission.