| SubscriptionRequestTypeCodeSet | char | Subscription Request Type
| 0 | = | Snapshot | Added FIX.4.2
| | [Snapshot] | | 1 | = | Snapshot + Updates (Subscribe) | Added FIX.4.2
| | [SnapshotAndUpdates] | | 2 | = | Disable previous Snapshot + Update Request (Unsubscribe) | Added FIX.4.2
| | [DisablePreviousSnapshot] |
| Added FIX.4.2
|