Where can I find the information to develop EDI IAIABC Release 3.0 formatted files to report to LWC directly?

Go to iaiabc.org and go to the online store to purchase the Implementation Guide release
3.0 or go directly to https://www.iaiabc.org/Forms.asp?MODE=NEW&Forms_FormTypeID=-811 Refer to Claims Release 3.0 (PDF Only) located on this page. Section 2 discusses Flat File Record Layouts.