Rec. 1.a-c: The DoD OIG recommended that the Director of the Defense Health Agency review and update Defense Health Agency Procedural Instruction 6490.04. At a minimum, the review and update should: a. Establish the timeline associated with 72-hour followup. b. Change the 72-hour followup from a recommendation to a requirement. c. Review the applicability and clinical use in its entirety of the Military Acute Concussion Evaluation, Version 2 tool within the Military Treatment Facilities.