S. Rept. 115-418: 21st Century Integrated Digital Experience Act, to Accompany S. 3050, December 5, 2018 [open pdf - 260KB]
"The 21st Century IDEA Act [21st Century Integrated Digital Experience Act] supports the goals of the President's Management Agenda and two of the four agency strategies by requiring that, as agencies develop new digital services and websites, they meet certain requirements that will improve customer service. For existing websites and services, the bill requires agencies to identify and prioritize those with the greatest impact on customer service and report in their budget requests the cost of modernization."
S. Rept. 115-418; Senate Report 115-418
U.S. Government Publishing Office: http://www.gpo.gov/