| Code Figure | Meaning |
|---|---|
| 24 | Type of Calendar See (Code Table 1.6) |
| 25-26 | Number of Tens of Thousands of Years of Offset |
| 255 | Missing |
| Notes: (1) The year can be recovered with the formula: Year(real/decoded) = Year + 10000 x offset (2) Years before year 1 shall be coded as defined in ISO 8601 (year 1 is followed by year 0). If applicable, year-1 or before shall be indicated by setting the most significant bit of octets 13-14 and 24-25 to "1" in accordance with Regulation 92.1.5. |