| Code figure | Meaning |
| 0 | A bit map applies to this product and is specified in this Section |
| 1-253 | A bit map pre-determined by the originating/generating center applies to this product and is not specified in this Section |
| 254 | A bit map defined previously in the same "GRIB" message applies to this product |
| 255 | A bit map does not apply to this product |