14 C.F.R. § 183.33
A Designated Airworthiness Representative (DAR) may, within limits prescribed by and under the general supervision of the Administrator, do the following:
(c) Perform authorized functions at any authorized location.
(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 23140, 48 FR 16179, Apr. 14, 1983, as amended by Amdt. 183-9, 54 FR 39296, Sept. 25, 1989; Amdt. 183-11, 67 FR 72766, Dec. 6, 2002; Docket FAA-2018-0119, Amdt. 183-17, 83 FR 9176, Mar. 5, 2018]