| Issue Date | Ruling Number | Certificate Number |
|---|---|---|
| 2020-09-22 | R-2020-165 | 97004-6 |
| 1997-04-16 | 209-R-1997 | 97004 |
| 1999-09-24 | 559-R-1999 | 97004-1 |
| 2006-10-31 | 602-R-2006 | 97004-2 |
| 2013-03-08 | 83-R-2013 | 97004-3 |
| 2015-10-01 | 316-R-2015 | 97004-4 |
| 2020-05-22 | LET-R-34-2020 | 97004-5 |
