49 C.F.R. § 175.79 Orientation of cargo.
Title 49 - Transportation
(a) A package containing hazardous materials marked “THIS SIDE UP” or “THIS END UP”, or with arrows to indicate the proper orientation of the package, must be stored and loaded aboard an aircraft in accordance with such markings. (b) A package containing liquid hazardous materials not marked as indicated in paragraph (a) of this section, must be stored and loaded with closures up (other than side closures in addition to top closures). [Amdt. 175–25, 47 FR 54823, Dec. 6, 1982]
Title 49: Transportation
PART 175—CARRIAGE BY AIRCRAFT
Subpart B—Loading, Unloading and Handling
§ 175.79 Orientation of cargo.