The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the NAC International (NAC or the applicant), MAGNASTOR[supreg] Cask System listing within the "List of approved spent fuel storage casks" to include Amendment No. 7 to Certificate of Compliance (CoC) No. 1031. Amendment No. 7 provides a new Passive MAGNASTOR[supreg] Transfer Cask (PMTC) and associated Technical Specification (TS) changes in Appendices A and B, and updates Section 4.3.1(i) in Appendix A of the TSs to include revised seismic requirements. Clarifying (non-technical) changes were also made to Appendices A and B.