| Issue Date | Ruling Number | Certificate Number |
|---|---|---|
| 1997-06-30 | 403-R-1997 | 97015 |
| 1997-12-24 | 704-R-1997 | 97015-1 |
| 2006-03-30 | 201-R-2006 | 97015-2 |
| 2006-06-05 | 326-R-2006 | 97015-3 |
| 2007-04-17 | 187-R-2007 | 97015-4 |
| 2010-02-26 | 70-R-2010 | 97015-5 |
| 2020-05-22 | LET-R-34-2020 | 97015-7 |
| 2014-01-21 | 16-R-2014 | 97015-6 |
