33 C.F.R. § 67.10-25
A person requesting a Coast Guard representative at a test of a sound signal must:
(a) Direct a written request to the Aids to Navigation Division (CG-NAV-1), U.S. Coast Guard Stop 7418, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7418 including:
[CGD 72-74R, 37 FR 13512, July 8, 1972, as amended by CGD88-052, 53 FR 25119,July 1, 1988; CGD 96-026, 61 FR 33663, June 28, 1996; USCG-2001-10714, 69 FR 24983, May 5, 2004; USCG-2010-0351, 75 FR 36281, June 25, 2010; USCG-2014-0410, 79 FR 38431, July 7, 2014; USCG-2015-0433, 80 FR 44279, July 27, 2015; USCG-2016-0498, 82 FR 35080, July 28, 2017]