The Department of Defense (the Department) is adopting this Munitions Response Site Prioritization Protocol (MRSPP) (hereinafter referred to as the ``rule'') under the authority of 10 U.S.C. 2710(b). Provisions of 10 U.S.C. 2710(b) require that the Department assign to each defense site in the inventory required by 10 U.S.C. 2710(a) a relative priority for response activities based on the overall conditions at each location and taking into consideration various factors related to safety and environmental hazards.