See Section C9.4.5.
Mandatory for Foreign Military Sales (FMS) Letters of Offer and Acceptance (LOAs) when a Nonrecurring Cost (NC) charge applies but the Term of Sale is "FMS Credit (Non-Repayable)."
Mandatory for Amendments and Modifications when the Term of Sale remains "FMS Credit (Non-Repayable) and lines are added and the NC charge applies to the new lines; or quantities are increased on lines where an NC charge applies.
"Nonrecurring Costs (NC) apply to line(s) [insert numbers] of this Foreign Military Sales (FMS) case. These charges are not included on this case because the Term of Sale is "FMS Credit (Non-Repayable)." If the Terms of Sale on this case are changed to include other terms, NC charges will be added to this case unless a waiver is requested and approved."