An update to the FAA’s JO 7110.663 rule means that air traffic controllers who use time-based clearances will soon no longer announce what time standard they are using. Effective April 3, controllers will no longer be required to state whether times are for UTC or coordinated universal time. In this example, “Falcon 372BX, climb to reach one three thousand at two two one five. Time two two one one and one-quarter,” the pilot is expected to be level at 13,000 feet at 22:15 UTC.