The Nuclear Regulatory Commission (NRC) is amending its regulations to add vitrified high-level waste (HLW) contained in a sealed canister designed to maintain waste containment during handling activities associated with transport to the forms of plutonium which are exempt from the double-containment packaging requirements for transportation of plutonium. This amendment responds to a petition for rulemaking submitted by the Department of Energy, Office of Civilian Radioactive Waste Management (DOE/OCRWM). This final rule grants the petition for rulemaking, with modifications, and completes NRC action on the petition. This final rule also will make a minor correction regarding the usage of metric and English units, to be consistent with existing NRC policy on such use.