Table D3
| Explanation of Data Designators T1T2A1A2ii CCCC |
| TABLE D3 Level designator ii (when T1T2= FA, UA) |
| Instructions for the proper application of the level designators |
| (1) | Noting that there is no known use of the series 80-99 for T1T2=UA, these series are allocated to routine aircraft reports up to 1 September 2008. After 1 September 2008, the series should be reserved for future use. |
| T1T2 | Level Designator ii | Data Type | Code Form (name) |
| FA | 01-49 | Aviation area /advisories | FM 53 (ARFOR)/[text] |
| FA | 50-59 | GAMET | [TEXT] |
| FA | 60-99 | Not assigned | Not assigned |
| UA | 01-59 | Routine aircraft reports | ICAO AIREP |
| UA | 60-69 | Special aircraft reports, except for volcanic ash | ICAO AIREP |
| UA | 70-79 | Special aircraft reports related to volcanic ash | ICAO AIREP |
| UA | 80-99 | Reserved for future use | ICAO AIREP |