NYISO Tariffs --> Open Access Transmission Tariff (OATT) --> 31 OATT Att Y New York ISO Comprehensive System Planning Pro --> 31.10 OATT Att Y Appendix G Long-Term Transmission Need Cost
Under the Long-Term Transmission Planning Process, Section 31.5.6.4 of Attachment Y to the ISO OATT provides the process for prescribing an alternative to the default cost allocation methodology for Long-Term Transmission Projects that the ISO selected pursuant to Section 31.6.11 of Attachment Y to the ISO OATT. This Appendix G contains the Commission-accepted alternative cost allocation methodologies that the ISO will apply instead of the default cost allocation methodology set forth in Section 31.5.6.4.3 of Attachment Y to the ISO OATT for selected Long-Term Transmission Projects.
Effective Date: 8/1/2026 - Docket #: ER26-2987-000 - Page 1