FEDERAL ENERGY REGULATORY COMMISSION

WASHINGTON, DC 20426

OFFICE OF ENERGY MARKET REGULATION

New York Independent System Operator, Inc.

Docket No. ER26-1265-000

Issued: March 17, 2026

On February 4, 2026, New York Independent System Operator, Inc. (NYISO) submitted proposed revisions[1] to its Open Access Transmission Tariff and Market Administration and Control Area Services Tariff to account for changes to underlying tariff sections that were approved by the Commission since NYISO proposed to sunset its Day-Ahead Demand Response Program and its Demand Side Ancillary Services Program.[2]  NYISO requested that the filing be accepted effective April 16, 2024 and October 31, 2025.  Pursuant to authority delegated to the Director, Division of Electric Power Regulation – East, under 18 C.F.R. § 375.307, the submittal is accepted for filing, effective April 16, 2024 and October 31, 2025, as requested.[3]

The filing was publicly noticed.  No protests or adverse comments were filed.  Pursuant to Rule 214 of the Commission’s regulations (18 C.F.R. § 385.214), notices of intervention, timely-filed motions to intervene, and any unopposed motions to intervene out-of-time filed before the issuance date of this order are granted. 

This action does not constitute approval of any service, rate, charge, classification, or any rule, regulation, contract, or practice affecting such rate or service provided for in the filed document(s); nor shall such action be deemed as recognition of any claimed contractual right or obligation affecting or relating to such service or rate; and such action is without prejudice to any findings or orders which have been or may hereafter be made by the Commission in any proceeding now pending or hereafter instituted by or against the applicant(s).

This order constitutes final agency action.  Requests for rehearing by the Commission may be filed within 30 days of the date of issuance of this order, pursuant to 18 C.F.R. § 385.713.

Issued by: Leanne Khammal, Acting Director, Division of Electric Power Regulation – East

Appendix – Tariff Records

New York Independent System Operator, Inc.

NYISO Tariffs

Effective April 16, 2024

• NYISO OATT, 6.1.9-6.1.15 OATT Schedule 1 - ISO Annual Budget Charge (9.0.0)             

Effective October 31, 2025

• NYISO MST, 26.4 MST Att K Operating Requirement and Bidding Requirement (34.0.0)
• NYISO MST, 18 MST Attachment C - Formulas For Determining Bid Productn (25.0.0)
• NYISO MST, 25 MST Attachment J - Determination Of Day-Ahead Margin Assu (25.0.0)
• NYISO MST, 15.4 MST Rate Schedule 4 - Payments for Supplying Operating (40.0.0)
• NYISO MST, 17.1 MST Att B LBMP Calculation (44.0.0)
• NYISO MST, 5.12 MST Requirements Applicable to Installed Capacity Suppl (57.0.0)
• NYISO MST, 13 MST Metering (19.0.0)
• NYISO MST, 4.4 MST Real-Time Markets and Schedules (56.0.0)
• NYISO MST, 4.5 MST Real Time Market Settlements (23.0.0)
• NYISO MST, 4.1 MST Market Services - General Rules (33.0.0)
• NYISO MST, 4.2 MST Day-Ahead Markets and Schedules (40.0.0)
• NYISO MST, 2.19 MST Definitions - S (37.0.0)
• NYISO MST, 2.9 MST Definitions - I (36.0.0)
• NYISO MST, 2.18 MST Definitions - R (36.0.0)
• NYISO MST, 2.13 MST Definitions - M (33.0.0)
• NYISO MST, 2.4 MST Definitions - D (20.0.0)
• NYISO MST, 2.5 MST Definitions - E (29.0.0)
• NYISO MST, 2.1 MST Definitions - A (20.0.0)
• NYISO MST, 2.3 MST Definitions - C (37.0.0)
• NYISO OATT, 6.1.9-6.1.15 OATT Schedule 1 - ISO Annual Budget Charge (10.0.0)
• NYISO OATT, 1.9 OATT Definitions - I (23.0.0)
• NYISO OATT, 1.19 OATT Definitions - S (22.0.0)
• NYISO MST, 2.14 MST Definitions - N (29.0.0)
• NYISO MST, 2.15 MST Definitions - O (21.0.0)
• NYISO OATT, 1.4 OATT Definitions - D (18.0.0)

[1] See Appendix for tariff records.

[2] New York Indep. Sys. Operator, Inc., 194 FERC ¶ 61,025 (2026).

[3] See 18 C.F.R. § 35.11; Cent. Hudson Gas & Elec. Corp., 60 FERC ¶ 61,106, reh’g denied, 61 FERC ¶ 61,089 (1992); but see Sunflower Elec. Power Corp., 173 FERC ¶ 61,054 (2020) (Danly, Comm’r, dissenting).