Since the FCC audit of licenses, the FCC now requires notifications of construction of every new or modified license within one year of granting the license. The FCC sends out one letter reminding you to notify them. If you don’t respond within 15 days after the construction deadline date, you have to file it with a waiver letter telling why you didn’t respond in a timely manner. If you miss your construction date by a month of so, your license goes into Termination Pending status. Then you have to file a non-docketed pleading stating your very good reason why you missed your deadline date to keep your license from being terminated. So it’s very important to file your construction notice as soon as you can.