4. The initial list of RACs originated from the report of the United States National Drought Policy Commission, &quot; Preparing for Drought in the 21st Century &quot; , published in May 2000.
4. La première liste des codes d &apos; activité pertinents était issue du rapport de l &apos; United States National Drought Policy Commission, &quot; Preparing for Drought in the 21st Century &quot; , publié en mai 2000.