The U.S. Department of Transportation’s (DOT ’s) Pipeline and Hazardous Materials Safety Administration has issued a proposal rule that would revise regulations governing the transport of radioactive material based on changes that the International Atomic Energy Agency made in 2009 to its transport standards. 76 Fed. Reg. 50,332 (8/12/11). The proposed rule, which would amend hazardous materials regulations at 49 C.F.R. parts 171-178, includes changes to requirements for (i) defining radioactive material; (ii) labeling packages; (iii) displaying measurement units; (iv) ensuring package integrity; (v) transporting liquid material; (vi) measuring emissions; (vii) labeling uranium hexafluoride; (viii) handling alpha, beta and gamma emitters; and (ix) applying radioactive material contamination limits to different shipment types. The agency requests comments on the proposed revisions by November 10, 2011.