| Length | From | To | Datatype | Format | Description and Comments |
|---|---|---|---|---|---|
| 2 | 1 | 2 | AN | X | Record ID - "66" |
| 5 | 3 | 7 | AN | X(3) | Commodity Group Code |
| 4 | 8 | 11 | N | 9(4) | Spread Priority |
| 7 | 12 | 18 | N | 9(7) | Inter Spread Credit Rate, in percent |
| 1 | 19 | 19 | N | 9 | Inter Spread Credit Rate Decimal Locator |
| 3 | 20 | 22 | AN | X(3) | Exchange Acronym Leg 1 |
| 1 | 23 | 23 | - | - | Filler |
| 6 | 24 | 29 | AN | X(6) | Combined Commodity Code Leg 1 |
| 7 | 30 | 36 | N | 9(7) | Delta/Spread Ratio Leg 1 |
| 1 | 37 | 37 | N | 9 | Delta/Spread Ratio Leg 1 Decimal Locator |
| 1 | 38 | 38 | AN | X | Spread Side Leg 1 ("A","B") |
| 3 | 39 | 41 | AN | X(3) | Exchange Acronym Leg 2 |
| 1 | 42 | 42 | - | - | Filler |
| 6 | 43 | 48 | AN | X(6) | Combined Commodity Code Leg 2 |
| 7 | 49 | 55 | N | 9(7) | Delta/Spread Ratio Leg 2 |
| 1 | 56 | 56 | N | 9 | Delta/Spread Ratio Leg 2 Decimal Locator |
| 1 | 57 | 57 | AN | X | Spread Side Leg 2 ("A","B") |
| 3 | 58 | 60 | AN | X(3) | Exchange Acronym Leg 3 |
| 1 | 61 | 61 | - | - | Filler |
| 6 | 62 | 67 | AN | X(6) | Combined Commodity Code Leg 3 |
| 7 | 68 | 74 | N | 9(7) | Delta/Spread Ratio Leg 3 |
| 1 | 75 | 75 | N | 9 | Delta/Spread Ratio Leg 3 Decimal Locator |
| 1 | 76 | 76 | AN | X | Spread Side Leg 3 ("A","B") |
| 3 | 77 | 79 | AN | X(3) | Exchange Acronym Leg 4 |
| 1 | 80 | 80 | - | - | Filler |
| 6 | 81 | 86 | AN | X(6) | Combined Commodity Code Leg 4 |
| 7 | 87 | 93 | N | 9(7) | Delta/Spread Ratio Leg 4 |
| 1 | 94 | 94 | N | 9 | Delta/Spread Ratio Leg 4 Decimal Locator |
| 1 | 95 | 95 | AN | X | Spread Side Leg 4 ("A","B") |
| 37 | 96 | 132 | - | - | Filler |
Notes: