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Amendments

All publicly available California ISO-authored tariff amendment filings are posted here in reverse chronological order.

Tariff amendments - filed in 2021
- Sep 8, 2021 Tariff amendment - clarification for term "business day" (ER21-2854)
- Sep 8, 2021 Tariff amendment - hybrid resources & co-located resources (ER21-2853)
- Aug 27, 2021 Tariff amendment - ESDER 4 (ER21-2779)
- Aug 3, 2021 Tariff amendment - EIM base schedule below minimum load (ER21-2593)
- Jul 27, 2021 Tariff amendment - Supercluster Interconnection Procedures (ER21-2530)
- Jul 23, 2021 Tariff amendments - NAESB standards (ER21-2495 & ER21-9246)
- Jul 19, 2021 Tariff amendment - FERC Order No. 2222 (ER21-2455)
- Apr 28, 2021 Tariff amendment - load, export, and wheeling (ER21-1790)
- Mar 29, 2021 Tariff amendment - resource adequacy (RA) enhancements (ER21-1551)
- Mar 26, 2021 Tariff amendment - 2021 Summer Readiness (ER21-1536)
- Mar 19, 2021 Tariff amendment - non-generator resource participation agreements - ESDER 4 (ER21-1487)
- Mar 18, 2021 Tariff amendment - Maximum Import Capability (ER21-1469)
- Mar 9, 2021 Tariff amendment - reconciliation filing (ER21-1304)
- Mar 3, 2021 Tariff amendment - variable operations and maintenance cost (ER21-1266)
- Feb 22, 2021 Tariff amendment - enhance pricing parameters - FERC Order No. 831 (ER21-1192)
- Feb 17, 2021 Tariff amendment - expedite execution - FERC Order No. 831 (ER21-1164)
- Jan 27, 2021 Tariff amendment - EIM enhancements on real-time settlements and base schedule timelines (ER21-955)
- Jan 8, 2021 Tariff amendment - hybrid resources phase 2 clarification (ER21-843)
Tariff amendments - filed in 2020
- Nov 20, 2020 Tariff amendment - pseudo-ties of shared resources (ER21-447)
- Oct 23, 2020 Tariff amendment - excess behind the meter production (ER21-190)
- Oct 15, 2020 Tariff amendment - grid management charge (GMC) cost of service study (ER21-112)
- Sep 18, 2020 Tariff amendment - settlement rules post day-ahead exceptional dispatch scheduled (ER20-2922)
- Sep 16, 2020 Tariff amendment - hybrid resources (ER20-2890)
- Aug 6, 2020 Tariff amendment - settlement timeline (ER20-2617)
- Aug 3, 2020 Tariff Amendment - petition for penalty assessments & non-refundable interconnection security 2019 (ER20-2604)
- Jul 16, 2020 Tariff amendment - energy storage and distributed energy resource stakeholder (ESDER) - Phase 3B (ER20-2443)
- Jul 10, 2020 Tariff amendment - tariff clarifications filing (ER20-2374)
- Jul 9, 2020 Tariff amendment - commitment costs and default energy bid enhancements (CCDEBE) (ER20-2360)
- May 27, 2020 Tariff amendment - proxy demand resources to provide flexible RA capacity (ER20-1904)
- May 22, 2020 Tariff amendment - intertie deviation settlement (ER20-1890)
- Apr 17, 2020 Tariff amendment - clarify resource adequacy obligations from commitment costs enhancements Phase 3 (ER20-1592)
- Apr 10, 2020 Tariff amendment - petition for limited waiver of tariff provisions - RAAIM (ER20-1552)
- Mar 13, 2020 Tariff amendment - reconcile overlapping approved tariff records (ER20-1281)
- Feb 25, 2020 Tariff amendment - capacity procurement mechanism soft offer cap (ER20-1075)
- Jan 2, 2020 Tariff amendment - implement deliverability assessment methodology enhancements (ER20-732)
Tariff amendments archive
Tariff amendments that are archived may still have reporting requirements that are filed regularly with FERC. These filed reports will appear in the archive.
- Tariff amendments - filed in 2019
- Tariff amendments - filed in 2018
- Tariff amendments - filed in 2017
- Tariff amendments - filed in 2016
- Tariff amendments - filed in 2015
- Tariff amendments - filed in 2014
- Tariff amendments - filed in 2013
- Tariff amendments - filed in 2012
- Tariff amendments - filed in 2011
- Tariff amendments - filed in 2010
- Tariff amendments - filed in 2009
- Tariff amendments - filed in 2008
- Tariff amendments - filed in 2007
- Tariff amendments - filed in 2006
- Tariff amendment - Market Redesign and Technology Upgrade (MRTU) (ER06-615)
  California ISO's February 9, 2006 filing in Docket No. ER06-615-000 for the California ISO's Market Redesign and Technology Upgrade (MRTU)
- Start-up tariff amendments