Structure
| Tag | Field Name | Req'd | Comments | |
|---|---|---|---|---|
| Component Block - <StandardHeader> | Y | MsgType <35> = CN | ||
| 324 | SecurityStatusReqID | Y | 
                 Must be unique, or the ID of previous Security Mass Status Request to disable if SubscriptionRequestType = Disable previous Snapshot + Updates Request (2).  | 
        
    |
| Component Block - <InstrumentScope> | N | |||
| 263 | SubscriptionRequestType | Y | 
                 SubcriptionRequestType indicates to the other party what type of response is expected. A snapshot request only asks for current information. A subscribe request asks for updates as the status changes. Unsubscribe will cancel any future update messages from the counter party.  | 
        
    |
| 1465 | SecurityListID | N | ||
| 1301 | MarketID | N | ||
| 1300 | MarketSegmentID | N | ||
| 336 | TradingSessionID | N | ||
| 625 | TradingSessionSubID | N | ||
| Component Block - <StandardTrailer> | Y | |||