Here are the current instructions:
Item 9a NAICS Code: Enter the North American Industry Classification System (NAICS) code for the occupation or type of business entered in Item 9. Batch filers should only enter codes from the list of NAICS Codes authorized for use in the FinCEN CTR and located on the BSA E- Filing Web Site (
http://bsaefiling.fincen.treas.gov/main.html) or from the Financial Crimes Enforcement Network U.S. Census Bureau NAICS list. If the Census Bureau list is used filers cannot substitute a sector code (such as 11 Agriculture, Forestry, Fishing and Hunting) for an actual three to six number NAICS Code (such as 11114 Wheat Farming)