8541.
 For purposes of this chapter, all of the following definitions apply:(a) “Electrical corporation” has the same meaning as defined in Section 218.
(b) “Large load customer” means a customer connecting transmission-level electricity service with an estimated peak demand of at least 75 megawatts. “Large load customer” excludes an existing customer that introduces a new load as a result of switching from fossil fuels to renewable fuels or transportation electrification activities.
(c) “Local publicly owned electric utility” has the same meaning as defined in Section 224.3.
(d) “Nonparticipating customer” means a customer who does not receive electrical service pursuant to the electrical corporation tariff established or modified pursuant to subdivision (a) of Section 8542.
(e) “Participating customer” means a customer who receives electrical service pursuant to the electrical corporation tariff established or modified pursuant to subdivision (a) of Section 8542.
8542.
 (a) On or before July 1, 2027, the commission shall establish or modify, in a rulemaking or in an electrical corporation specific application, an electrical corporation tariff for the interconnection of participating customer facilities and the provision of transmission, distribution, and generation services to participating customers. (b) The commission, as part of establishing or modifying the electrical corporation tariff, shall do, at a minimum, all of the following:
(1) Establish eligibility criteria for large load customers and facilities.
(2) Evaluate the risks and benefits of this tariff to nonparticipating
ratepayers.
(3) Ensure that the tariff prevents the creation of stranded costs for, or cost shifts to, nonparticipating ratepayers.
(c) The electrical corporation tariff shall incorporate all of the following criteria:
(1) The electrical corporation tariff shall assign participating customers any unique wholesale energy costs, including ancillary and reliability services costs attributable to rapid fluctuations in demand by the participating customer.
(2) The electrical corporation tariff shall include a reasonable share of the costs relating to wildfire mitigation, wildfire liability, electrification and environmental programs, and other societal cost obligations typically collected from distribution-level ratepayers.
(3) The interconnection provisions of the electrical corporation tariff shall do all of the following:
(A) Require a large load customer that submits an application for interconnection of a facility to an electrical corporation to disclose whether an application for the same facility has been submitted in other electrical corporation service territories or other jurisdictions and to disclose each instance in which an application for the same facility has been submitted.
(B) Assign cost responsibility for all transmission facility upgrades triggered by a facility interconnection to the applicable participating customer. To the extent permitted under federal law, these costs should include shared transmission grid network upgrades needed to accommodate the interconnection of the participating customer’s facility or
increase the flow of electricity across the electrical grid.
(C) Allow a participating customer to receive refunds of a portion of its initial nominal dollar contributions to interconnection costs only to the extent that actual annual net revenues cover the costs of energization, the costs of providing electric service, and other costs allocated by the commission to the participating customer.
(D) Require an early termination fee to be assessed against any participating customer that departs the electrical system within 15 years of the initial interconnection of the facility or fails to achieve full load ramp up. The early termination fee should not be less than the revenue gap associated with the originally projected demand and energy consumption of the facility over the minimum 15-year term.
(4) Each participating
customer shall be required to install onsite zero-carbon energy storage with at least four hours of capacity at no less than 50 percent of forecasted peak demand. Storage capacity shall be dispatchable by the electrical corporation or Independent System Operator to address emergency conditions on the electrical grid.
(5) Each participating customer shall participate in demand response programs as determined by the commission.
(d) Each electrical corporation shall be required to publish and update maps showing locations where large load customers can interconnect without the need for significant, costly, and time-consuming transmission upgrades.
8543.
 A local publicly owned electric utility is encouraged, before connecting a facility to the electrical grid, to develop a tariff that is similar to the electrical corporation tariff established or modified pursuant to subdivision (a) of Section 8542 and ensures both of the following:(a) The costs are not shifted from a large load customer that is subject to the tariff to a large load customer that is not subject to the tariff.
(b) The costs of investments in infrastructure made by a large load customer that is subject to the tariff are not recoverable from other nonparticipating ratepayers.