The new “NYC COVID Safe” app is designed to display a photo of a person’s ID alongside an image of their COVID-19 vaccine records or the results of a recent diagnostic test for the novel coronavirus. De Blasio said the new policy will start being implemented Aug. 16, with enforcement to follow on Sept. 13. The announcement made New York the first U.S. jurisdiction to require people entering public venues to be inoculated against COVID-19, following similar policies that went into effect last month in France and Italy.