President JFK signed EO 10973 creating theUSAIDbut I found EO 12161 signed by Jimmy Carterrevoking EO 10973September 1979.

EO 12161 Page 17 (screenshot)

https://archives.federalregister.gov/issue_slice/1979/10/2/56663-56680.pdf#page=11

History of EO 10973: (scroll down to find)

https://www.federalregister.gov/presidential-documents/executive-orders/john-f-kennedy/1961