Home1999 Treaties and Agreements ...Guatemala (13041) – Memorandum of Cooperation for Mutual Cooperation in the Promotion and Development of Civil Aviation hide Guatemala (13041) – Memorandum of Cooperation for Mutual Cooperation in the Promotion and Development of Civil Aviation TIAS Office of Treaty Affairs June 11, 1999 Transportation: Aviation Cooperation Memorandum of cooperation signed at Washington and Guatemala May 26 and June 11, 1999; Entered into force June 11, 1999. Download Attachment [460 KB] Tags Guatemala Transportation Treaties