House Office of Congressional Ethics: History, Authority, and Procedures [February 9, 2017] [open pdf - 865KB]
"The House Office of Congressional Ethics (OCE) was established on March 11, 2008, with the passage of H.Res. 895. It was most recently reauthorized by the House as part of the rules package (H.Res. 5) adopted by the 115th Congress on January 3, 2017. [...] This report describes the history and rationale behind the creation of the OCE, its operations, its relationship with the House Committee on Ethics, and options potentially available for Congress if further amendments to the House ethics process are desired."
CRS Report for Congress, R40760
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html