The U. S. Army Corps of Engineers is updating part of the Federal Regulation outlining how USACE implements its emergency authority provided in Public Law 84-99 for disaster preparedness, response, and recovery. The regulation was last revised in 2003. Since that time, there have been amendments to Public Law 84-99 through multiple Water Resource Development Acts passed by Congress. Additionally, USACE programs have evolved to implement lessons learned from events over the last 20 years. USACE will update the federal regulation to reflect these changes.