8eb4e8a0_se_Security_Cooperation_Agency__Definition
[Term] Bill (or Billing) Code [Link] N/A [Definition] 
This is a DFAS-IN country assigned code that divides FMS customer country billings into management levels lower than a U.S. Implementing Agency or in-country service. T his code often correlates to an FMS customer paying office. It appears in Block 3 of the DD Form 645. Basic alpha codes are derived from the LOA . The FMS customer should ensure that the proper bill code is indicated upon acceptance of an LOA.
ESAMM Glossary | Defense Security Cooperation Agency
Definition