FILE – In this April 8, 2014, file photo, construction workers listen to a safety talk by a manager in front of Union Station, undergoing renovation and expansion, in Denver. Rollout of the Government Accounting Standards Board's reporting rules for economic development tax breaks has not been without hiccups, with the nonprofit board issuing an April 2017 clarification about tax increment financing, or TIF, districts. The mechanism was used to develop Union Station and other projects nationwide. (AP Photo/Brennan Linsley, File)