Congressional Member Organizations: Their Purpose and Activities, History, and Formation [September 24, 2013] [open pdf - 0B]
"This report examines the purpose and activities of CMOs [Congressional Member Organizations] and the reasons Members form them. It also identifies and describes seven CMO types, and it provides an overview of the historical development of informal Member organizations since the first Congress, focusing on their regulation in the House by the Committee on House Oversight/Committee on House Administration, the rise and fall of legislative service organizations (LSOs), and the House's decision in 1995 to issue regulations for establishing CMOs and governing their behavior. It concludes with a step-by-step guide for House Members and staff who might be interested in forming a CMO. Many of the steps in the guide may be of interest to Senators and their staff who are considering forming an informal Member group in the Senate."
CRS Report for Congress, R40683
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html