102-118.50—How does my agency pay for transportation services?
         Your agency may pay for transportation services in three ways:
    
    
        
        (a) Electronic funds transfer (EFT) (
         ). Your agency is required by statute to make all payments by EFT unless your agency receives a waiver from the Department of the Treasury.
    
    
        
        (b) Check.
         For those situations where EFT is not possible and the Department of the Treasury has issued a waiver, your agency may make payments by check.
    
    
        
        (c) Cash.
         In very unusual circumstances and as a last option, your agency payments may be made in cash in accordance with Department of the Treasury regulations ( 31 CFR part 208 ).