| Tag | Field Name | Req'd | Comments | 
                           
                              | Component Block - <StandardHeader> | Y | MsgType = BR | 
                           
                              | 320 | SecurityReqID | N |  | 
                           
                              | 322 | SecurityResponseID | N | Identifier for the Derivative Security List message | 
                           
                              | 560 | SecurityRequestResult | N | Result of the Security Request identified by SecurityReqID | 
                           
                              | 980 | SecurityUpdateAction | N | Updates can be applied to Underlying or option class. If Series information provided, then Series has explicitly changed | 
                           
                              | Component Block - <UnderlyingInstrument> | N | Underlying security for which derivatives are being returned | 
                           
                              | Component Block - <DerivativeSecurityDefinition> | N | Group block which contains all information for an option family. If provided DerivativeSecurityDefinition qualifies the strikes
                                 specified in the Instrument block. DerivativeSecurityDefinition contains the following components: DerivativeInstrument. DerivativeInstrumentExtension,
                                 MarketSegmentGrp | 
                           
                              | 393 | TotNoRelatedSym | N | Used to indicate the total number of securities being returned for this request. Used in the event that message fragmentation
                                 is required. | 
                           
                              | 893 | LastFragment | N | Indicates whether this is the last fragment in a sequence of message fragments. Only required where message has been fragmented. | 
                           
                              | Component Block - <RelSymDerivSecUpdGrp> | N |  | 
                           
                              | Component Block - <ApplicationSequenceControl> | N |  | 
                           
                              | 60 | TransactTime | N |  | 
                           
                              | Component Block - <StandardTrailer> | Y |  |