The identification scheme identifier of the Invoiced object identifier.
    If it may be not clear for the receiver what scheme is used for the identifier, a conditional scheme identifier should be used that shall be chosen from the UNTDID 1153 code list [6] entries.
About
    - ID
 
    IBT-018-1 
    
    - Cardinality
 
    0..1 
    
    
    
    - Section
 
    - Shared
 
    
    
    - Name
 
    - The identification scheme identifier of the Invoiced object identifier.
 
    
    
    
    
    - Syntax binding
 
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    - Rules
 
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            - IBR-CL-07: [ibr-cl-07]-Object identifier identification scheme (ibt-018-1) (ibt-128-1) MUST be coded using a restriction of UNTDID 1153.