The Accords were signed on 13 October 2020 by representative of the national space agencies of eight countries: Australia, Canada, Italy, Japan, Luxembourg, the United Arab Emirates, the United Kingdom and the United States.[14] Subsequent signatories are Ukraine, South Korea, New Zealand, Brazil, Poland, Mexico, Israel, Romania, Bahrain, Singapore, Colombia, France and Saudi Arabia. The Accords remain open for signature indefinitely, as NASA anticipates other nations will join.[15] Additional signatories to the Accords may not directly be involved in the Artemis Program, but have nevertheless committed to the principles set out in the Accords.