On May 31, 2016, the U.S. Nuclear Regulatory Commission (NRC) confirmed the effective date of May 31, 2016, for the direct final rule that was published in the Federal Register on March 14, 2016. The direct final rule amended the NRC's spent fuel storage regulations by revising the Holtec International (Holtec) HI-STORM 100 Cask System listing within the "List of approved spent fuel storage casks" to include Amendment No. 10 to Certificate of Compliance (CoC) No. 1014. The NRC confirmed the effective date because it determined that none of the comments submitted on the direct final rule met any of the criteria for a significant adverse comment. The purpose of this document is to provide responses to the comments received on the direct final rule.