The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage cask regulations by revising the NAC International, Inc., NAC-UMS Universal Storage System listing within the "List of Approved Spent Fuel Storage Casks" to include Amendment No. 5 to Certificate of Compliance (CoC) Number 1015. Amendment No. 5 will modify the CoC to incorporate certain high burnup pressurized water reactor (PWR) fuel as approved contents and to reflect those changes in the associated Technical Specifications (TS). In addition, the amendment to the CoC will include several other changes to the TS and the Final Safety Analysis Report (FSAR) to enhance the loading and storage operation of the NAC-UMS Universal Storage System.