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Under the Energy Independence and Security Act of 2007 (EISA), Public Law 110-140, the U.S. Department of Energy (DOE) must conduct two rulemakings to evaluate whether to amend the standards in effect for external power supplies. DOE completed the first rulemaking in 2014, which, consistent with the statute, amended the statutorily prescribed standards set by EISA, see 79 FR 7846 (Feb. 10, 2014). This proceeding will be the second (and final) rulemaking required under EISA and will evaluate whether to amend the current standards for external power supplies or issue a determination that no amendments to the current standards are required. Once completed, this rulemaking will fulfill DOE’s statutory obligation to either propose an amended standard for this equipment or determine that the standards do not need to be amended.