FERC Accepts MISO Attachment P Tariff Revisions - ER26-1423
Summary
FERC issued a delegated letter order accepting Midcontinent Independent System Operator's filing of revisions to Attachment P in its Open Access Transmission, Energy and Operating Reserve Markets Tariff under Docket ER26-1423. The order, authored by N. Yingle-Stewart of FERC's Office of Energy Market Regulation, approves modifications to MISO's tariff provisions. The tariff revisions affect market participants operating within MISO's regional transmission organization footprint.
What changed
FERC accepted MISO's February 17, 2026 filing of revisions to Attachment P of its Open Access Transmission, Energy and Operating Reserve Markets Tariff. The delegated order approves these modifications without modification, completing the regulatory acceptance process for the tariff amendments.\n\nMarket participants operating within MISO's RTO footprint should review the accepted revisions to understand updated transmission service terms, cost allocation methodologies, and market participation requirements. Entities with existing or pending transmission service agreements should ensure their internal procedures reflect the accepted tariff modifications.
What to do next
- Review accepted tariff revisions to Attachment P for operational impact
- Update transmission service procedures and cost allocation documentation
- Assess implications for market participation agreements
Archived snapshot
Apr 7, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Document Info for Accession Number: 20260407-3002
Details Document: 04/07/2026
Filed: 04/07/2026
Posted: 04/07/2026 08:19:05 AM
First Received Date: 04/07/2026 08:12:32 AM
Security Level: Public
Official: Yes
E-filing: No
Non-decisional: No
Category: Issuance
Library: Electric
Aperture: 0
File Type:
Description* :** Letter order accepting Midcontinent Independent System Operator, Inc.'s 02/17/2026 filing of revisions to Attachment P in its Open Access Transmission, Energy and Operating Reserve Markets Tariff etc. under ER26-1423.
File List
| Docket | Sub-Docket | Type |
|---|---|---|
| ER26-1423 | 000 | On Document |
| Document Class | Document Type |
|---|---|
| Order/Opinion | Delegated Order |
| Correspondent | Last Name | First Name | MI | Role/Org |
|---|---|---|---|---|
| RECIPIENT | * | * | MIDCONTINENT INDEPENDENT SYSTEM OPERATOR, INC. | |
| AUTHOR | Tingle-Stewart | N | Y | OFFICE OF ENERGY MARKET REGULATION |
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