The records required under Sec. 41.181 shall be kept by the importer at his usual place of business unless otherwise authorized in writing by the appropriate TTB officer, and shall be made available for inspection by the appropriate TTB officer upon his request. (For retention period, see Sec. 41.22.) [T.D. ATF-40, 42 FR 5007, Jan. 26, 1977. Redesignated and amended by T.D. TTB-16, 69 FR 52424, 52425, Aug. 26, 2004] Sec. 41.183 [Reserved]