| WAC Sections | |
| 480-85-010 | Purpose. |
| 480-85-020 | Applicability. |
| 480-85-030 | Definitions. |
| 480-85-040 | Minimum filing requirements. |
| 480-85-050 | Cost of service study inputs. |
| 480-85-060 | Cost of service methodology. |
| 480-85-070 | Exemptions from rules in chapter 480-85 WAC. |