S. Rept. 116-31: Access to Congressionally Mandated Reports Act, Report to Accompany S. 195, Including Cost Estimate of the Congressional Budget Office, April 10, 2019 [open pdf - 250KB]
"The purpose of S. 195, Access to Congressionally Mandated Reports Act, is to increase transparency of Federal Government operations by requiring the Government Publishing Office (GPO) to publish online all congressionally-mandated government reports issued by Federal agencies."
S. Rept. 116-31; Senate Report 116-31
U.S. Government Publishing Office: http://www.gpo.gov/