1
0
0
0
Experimental
Operational
2
1
1 November 1988
Operational
3
2
1 November 1993
Operational
4
3
2 November 1994
Operational
5
4
8 November 1995
Operational
6
5
6 November 1996
Operational
7
6
5 November 1997
Operational
8
7
4 November 1998
Operational
9
8
1
3 May 2000
Operational
10
9
8 November 2000
Operational
11
1
10
2
7 November 2001
Operational
12
2
11
3
5 November 2003
Operational
13
3
12
4
2 November 2005
Operational
14
4
13
5
7 November 2007
Operational
15
5
14
6
4 November 2009
Operational
16
6
15
7
15 September 2010
Operational
17
7
16
16
4 May 2011
Operational
18
8
17
17
2 November 2011
Operational
19
9
18
18
2 May 2012
Operational
20
10
19
19
7 November 2012
Operational
21
11
20
20
8 May 2013
Operational
22
12
21
21
14 November 2013
Operational
23
13
22
22
7 May 2014
Operational
24
14
23
23
5 November 2014
Operational
25
15
24
24
6 May 2015
Operational
26
16
25
25
11 November 2015
Operational
27
17
26
26
4 May 2016
Operational
28
18
27
27
2 November 2016
Operational
29
19
28
28
3 May 2017
Operational
30
20
29
29
8 November 2017
Operational
31
21
30
30
2 May 2018
Operational
32
22
31
31
7 November 2018
Operational
33
23
32
32
15 May 2019
Operational
34
24
33
33
6 November 2019
Operational
35
25
34
34
6 May 2020
Operational
36
26
35
35
Pre-operational to be implemented by next amendment
Operational
37
27-254
36-254
36-254
Future versions
Operational
38
255
255
255
Missing
Operational