safety (1) Deadline (A) In general Not later than two years after the date of the enactment of the Blast Overpressure Safety Act, the Secretary of Defense shall identify and disseminate the thresholds for blast exposure and blast overpressure safety and associated emerging scientific evidence required under subsection (b)(1)(B). (B) Update Not less frequently than every five years, the Secretary of Defense shall update the thresholds for blast exposure and blast overpressure safety and associated emerging scientific evidence required under subsection (b)(1)(B). (2) Central repository Not later than two years after the date of the enactment of the Blast Overpressure Safety Act, the Secretary of Defense shall establish a central repository of blast-related characteristics, such as pressure profiles and common blast loads associated with specific systems and the environments in which they are used, that is available to members of the armed forces and the public and includes the information described in subsection (b)(1)(B). (3) Waivers (A) Protocols Not later than two years after the date of the enactment of the Blast Overpressure Safety Act, the Secretary of Defense shall establish and implement protocols to require waivers in cases in which members of the armed forces must exceed the safety thresholds described in subsection (b)(1)(B), which shall include a justification for exceeding those safety thresholds. (B) Tracking system (i) In general Not later than two years after the date of the enactment of the Blast Overpressure Safety Act, the Secretary of Defense shall establish a Department of Defense-wide tracking system for waivers described in subparagraph (A), which shall include data contributed by each of the Secretaries concerned. (ii) Report (I) In general Not less frequently than once each year by December 31 of that year following the establishment of the tracking system required under clause (i), the Secretary of Defense shall submit to the Committees on Armed Services of the Senate and the House of