| Offset | Name | Size | Contents |
| 4 | ccf | 2 | Number of conditional formats |
| 6 | grbit | 2 | Option flags |
| 8 | rwFirst | 2 | First row to conditionally format (0-based) |
| 10 | rwLast | 2 | Last row to conditionally format (0-based) |
| 12 | colFirst | 2 | First column to conditionally format (0-based) |
| 14 | colLast | 2 | Last column to conditionally format (0-based) |
| 16 | rgbSqref | var | Array of sqref structures |
| Bits | Mask | Name | Contents |
| 0 | 01h | fToughRecalc | = 1 if the appearance of the cell requires significant processing |
| 15 – 1 | FFFEh | (Reserved) | Reserved; must be 0 (zero) |
| Offset | Name | Size | Contents |
| 0 | irefMac | 2 | Number of areas that follow |
| 2 | reref | var | Array of ref structures |
| Offset | Name | Size | Contents |
| 0 | rwFirst | 2 | First row in the reference |
| 2 | rwLast | 2 | Last row in the reference |
| 4 | colFirst | 2 | First column in the reference |
| 6 | colLast | 2 | Last column in the reference |