At what point does Peoplesoft update the workflow after reading email approvals?

I have an approval workflow setup in Peoplesoft.  I am using both worklists and email approvals for this approval workflow.  A user receives and email to approve or deny a request.  The user sends back an approval email.  The delivered process EOAWEMC runs to read the emails and updated the workflows.  The program updates the following table with this sql statement: SQLExec("UPDATE PS_EOAWEMC_PND_HDR SET COMPLETE_FLAG = 'Y' WHERE GUID = :1", &sentDataHdr.GUID.Value);

I cannot find where EOAWEMC updates the workflow to an approved status.  Where is this done at?