3118c588_811_Implementation_Guide__Element_Name__
[Ref _] ISA11 [Id_] I10 [Req] M [Type] ID [Min/Max] 1/1 [Usage_] Must use [Element Name _] 
Interchange Control Standards Identifier Description: Code to identify the agency responsible for the control standard used by the message that is enclosed by the interchange header and trailer All valid standard codes are used.
811 Implementation Guide
Element Name _