14 C.F.R. § 183.13
(c) A “Certificate of Authority,” stating the specific functions which the person concerned is authorized to perform and stating an expiration date, is issued to each Designated Airworthiness Representative, along with a “Certificate of Designation” for display purposes.
(Secs. 601 and 602, 72 Stat. 752, 49 U.S.C. 1421-1422; secs. 313(a), 314, 601, 603, 605, and 1102, Federal Aviation Act of 1958, as amended (49 U.S.C. 1354(a), 1355, 1421, 1423, 1425, and 1502); sec. 6(c) Department of Transportation Act (49 U.S.C. 1655(c)))
[Docket 1151, 27 FR 4951, May 26, 1962, as amended by Amdt. 183-2, 32 FR 46, Jan. 5, 1967; Amdt. 183-8, 48 FR 16179, Apr. 14, 1983]