Docket No. ER26-2567-000 1
FEDERAL ENERGY REGULATORY COMMISSION
WASHINGTON, DC 20426
OFFICE OF ENERGY MARKET REGULATION
New York Independent System Operator, Inc.
Docket No. ER26-2567-000
On May 18, 2026, New York Independent System Operator, Inc. (NYISO) submitted revisions to the Market Administration and Control Area Services Tariff to allow NYISO to dispatch Combined Cycle Gas Turbine Generators with Duct-Firing Capability that opt for use of the Limiting Participation Flag in a manner that is compatible with NYISO’s existing dispatch framework and better aligns with the physical operating characteristics of these units.[1] 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 as requested. No less than seven days prior to the date NYISO implements the proposed tariff revisions with a 12/31/9998 effective date, NYISO is required to make a compliance filing in this docket through the Commission’s eTariff system with the accepted tariff record text that establishes the actual effective date of the tariff records and designates the records accepted in this order as OBE (overtaken by events).[2]
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
[1] New York Independent System Operator, Inc., NYISO Tariffs, NYISO MST, 4.4 MST Real-Time Markets and Schedules (57.0.0); NYISO MST, 17.1 MST Att B LBMP Calculation (45.0.0).
[2] NYISO must make a compliance filing using Type of Filing Code 80 in this docket by including the associated filing identifier (associated_filing_id) for this filing at the filing level. The filing must include tariff records with the effective date for the previously-accepted tariff records and also include, at the tariff record level, the associated filing identifier (associated filing_id), associated record id (associated_record_id), and associated option code (associated_option_code) of the original tariff records accepted with a 12/31/9998 date.