Identification Markings Placed on Imported Explosive Materials (2000R- 238P), Advance Notice of Proposed Rulemaking [open pdf - 121KB]
From the Summary: "The Bureau of Alcohol, Tobacco and Firearms (ATF) is considering amending the regulations to require licensed importers to legibly identify by marking all imported explosive materials. Based on a petition we have received, we wish to gather information by inviting comments from the public and industry whether the regulations should be amended."
Federal Register: http://www.federalregister.gov/
Federal Register (November 13, 2000), v.65, no.219, p.67669-67670