These are memoranda which have been issued by USCIS (and INS prior to the creation of USCIS) on this topic. You will need the free Adobe Reader software to view these files.
Petitions File by Pegasus Consulting Group, Inc. [...] Pursuant to Sections 204 and 214(c) of the Act (62KB PDF)Barbara Q. VelardeChief, Service Center Operations05/11/2009
Organizations Ineligible for Approval of Immigrant and Nonimmigrant Petitions Under Section 212(n)(2)(C)(i) and (ii) of the Act (85KB PDF)Barbara Q. VelardeChief, Service Center Operations05/11/2009
Supplemental Guidance Relating to Processing Forms I-140 Employment-Based Immigrant Petitions and I-129 H-1B Petitions, and Form I-485, Adjustment Applications Affected by the American Competitiveness in the Twenty-First Century Act of 2000 (...) (138KB PDF)Donald Neufeld, Acting Associate Director, Domestic Operations05/30/2008