| Sending EMDIS registry (REG_SND) | REG_SND | Optional | N4 | 
                            
                                
                                    | Receiving EMDIS registry (REG_RCV) | REG_RCV | Optional | N4 | 
                            
                                
                                    | Code operation of erroneous message (MSG_CODE) | MSG_CODE | Required | A10 | 
                            
                                
                                    | Patient identification (Patient Identification) | P_ID | Optional | A17 | 
                            
                                
                                    | Donor identification (Donor Identification ( to be replaced by GRID)) | D_ID | Optional | A17 | 
                            
                                
                                    | Global registration identifier for donors (old format, deprecated).For information regarding GRID in the new format please see field D_GRID. (GRID) | GRID | Optional | A19 | 
                            
                                
                                    | Reference code (REF_CODE) | REF_CODE | Optional | A15 | 
                            
                                
                                    | Origin of denial (ORG_DEN) | ORG_DEN | Required | A20 | 
                            
                                
                                    | Remark (REMARK) | REMARK | Required | A120 | 
                            
                                
                                    | The unit identification assigned by the hub. It may be the same as the local ID (CB_LOCAL_ID) (Cord Blood Unit Identification) | CB_ID | Optional | A17 | 
                            
                                
                                    | Global registration identifier for donors (GRID) | D_GRID | Optional | A19 |