WAC 480-120-251
| WSR Filing Number | Type of Filing | Date of Filing |
| 13-09-051 | Permanent Rule | 4/16/2013 |
| 13-06-026 | Proposal Supplemental | 2/27/2013 |
| 13-01-068 | Proposal Original Notice | 12/18/2012 |
| 12-18-018 | Proposal Continuance | 8/24/2012 |
| 12-15-070 | Proposal Original Notice | 7/18/2012 |
| 12-09-084 | Preproposal Statement of Inquiry | 4/18/2012 |
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