| 1969 | May | initially adopted |
| 1970 | October | amended |
| 1973 | July | amended |
| 1983 | February | an error was corrected |
| 1983 | October | amended |
| 1991 | January | amended |
| 1999 | September | amended |
| 2003 | August | amended |
| 2008 | July | amended |
| 2019 | August | amended |
| 2021 | January | an error was corrected |
