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Last updated: 01 May 2026

2 - Draft Assumptions Book v3.0 -clean

2 - Draft Assumptions Book v3.0 -clean.pdf (PDF 3.92 MB)

Last updated: 01 May 2026

1 - Proposed updates to Assumptions Book v3.0

1 - Proposed updates to Assumptions Book v3.0.pdf (PDF 904.93 KB)

Last updated: 01 May 2026

4 - Appendix F of Draft Assumptions Book v3

4 - Appendix F of Draft Assumptions Book v3.xlsx (XLSX 504.93 KB)

Last updated: 01 May 2026

3 - Draft Assumptions Book v3.0 -track changes

3 - Draft Assumptions Book v3.0 -track changes.pdf (PDF 4.88 MB)

Last updated: 01 May 2026

6 - Simpson Grierson - legal assurance compliance with TPM

6 - Simpson Grierson - legal assurance compliance with TPM.pdf (PDF 106.93 KB)

Last updated: 01 May 2026

5 - RBP - technical assurance report on reasonableness of updates

5 - RBP - technical assurance report on reasonableness of updates.pdf (PDF 729.13 KB)

Last updated: 24 Apr 2026

Rates Table April 2026

Rates Table April 2026.pdf (PDF 229.49 KB)

Last updated: 24 Apr 2026

Orion BBI Allocation Consultation HVDC Cross Submission

Orion BBI Allocation Consultation HVDC Cross Submission.pdf (PDF 177.26 KB)

Last updated: 22 Apr 2026

Appendix G - Proposed drafting changes - Simple Method Period Extension

Appendix G - Proposed drafting changes - Simple Method Period Extension.pdf (PDF 109.27 KB)

Last updated: 22 Apr 2026

Appendix E - Proposed drafting changes - Adjustment Events Batching

Appendix E - Proposed drafting changes - Adjustment Events Batching.pdf (PDF 212.19 KB)