# Code table 4.4 - Indicator of unit of time range
0 m Minute 
1 h Hour 
2 D Day 
3 M Month 
4 Y Year 
5 10Y Decade (10 years) 
6 30Y Normal (30 years) 
7 C Century (100 years) 
# 8-9 Reserved 
10 3h 3 hours 
11 6h 6 hours 
12 12h 12 hours 
13 s Second 
# 14-191 Reserved 
# 192-254 Reserved for local use 
255 255 Missing