Table update for WMO version
20 20 Version implemented on 8 November 2017
21 21 Version implemented on 2 May 2018
22 22 Version implemented on 7 November 2018
-23 23 Pre-operational to be implemented by next amendment
+23 23 Version implemented on 15 May 2019
# 24-254 Future versions
255 255 Master tables not used. Local table entries and local templates may use the entire range of the table, not just those sections marked Reserved for local used.
