Foreign Affairs Manual, Volume 9 (Visas)

The Foreign Affairs Manual (FAM) is the handbook consulted by consular officers when they decide an immigrant or nonimmigrant visa application. It contains a wealth of information on the application process, grounds of inadmissibility (ineligibility), the various classifications for immigrant and nonimmigrant visas, and revocation of a visa.

The FAM currently is available on the U.S. Department of State website at https://fam.state.gov/. With the Trump administration's retreat from transparency, however, the Law Office of Scott A. Mossman published here a PDF file containing Volume 9 concerning visas.
 
Foreign Affairs Manual, Vol. 9, Visas (PDF).
 
This version of 9 FAM 101.1 through 504.13 was downloaded from the Department of State website on July 6, 2017.