27 C.F.R. § 555.54
(a) During the term of a license or permit, a licensee or permittee may move his business or operations to a new address at which he intends to regularly carry on his business or operations, without procuring a new license or permit. However, in every case, the licensee or permittee shall—
(b) Licensees and permittees whose mailing address will change must notify the Chief, Federal Explosives Licensing Center, at least 10 days before the change.
(Paragraph (b) approved by the Office of Management and Budget under control number 1140-0080)
[T.D. ATF-87, 46 FR 40384, Aug. 7, 1981, as amended by T.D. ATF-290, 54 FR 53054, Dec. 27, 1989; ATF No. 1, 68 FR 13786, Mar. 20, 2003; ATF 2013R-9F, 79 FR 46693, Aug. 11, 2014]