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Access California ISO tariffs, filings and orders dating back to the ISO's June 28, 2010 baseline tariff filing with the Federal Energy Regulatory Commission (FERC). The currently effective ISO tariff is located on the Regulatory page. The eTariff Viewer is intended for research purposes as it does not contain all currently effective ISO tariff language, nor does it contain all FERC directives as these directives may not have been issued within FERC’s eTariff system.