From the Document Summary: "This notice publishes the 2019 List of Explosive Materials, as required by law. The 2019 list is the same as the 2018 list published by ATF [Bureau of Alcohol, Tobacco, Firearms, and Explosives], except that the 2019 list adds four explosives not previously listed."
Docket No. 2019R-04
Federal Register: http://www.federalregister.gov/
Federal Register (January 2, 2020), v.85 no.1