By: Nigel Bankes
PDF Version: Court of Appeal Confirms ISO Rule on the Allocation of Intertie Capacity
Case Commented On: Saskatchewan Power Corporation v Alberta (Utilities Commission), 2015 ABCA 183
With the commissioning of the Montana/Alberta intertie – a transmission line for electric energy connecting neighbouring transmission systems and allowing the transfer of electricity between jurisdictions – the Independent System Operator (ISO), operating under the name of the Alberta Electric System Operator (AESO), concluded that its existing last-in-first-out rule for the allocation of available transfer capability (ATC) on interties operated unfairly. It therefore engaged in a rule-making exercise as provided for under ss.20 – 20.4 of the Electric Utilities Act, SA 2003, c E-5.1 (EUA) resulting in the adoption of a proposed new ISO Rule on Available Transfer Capability and Transfer Path Management. The new Rule adopts a pro-rata methodology for allocating ATC. Section 20.2(1) of the EUA requires the ISO to file the proposed rule with the Alberta Utilities Commission (AUC) so as to give market participants (MPs) the opportunity to object in s.20.4(1):
20.4(1) A market participant may object to an ISO rule that is filed under section 20.2 on one or more of the following grounds:
(a) that the Independent System Operator, in making the ISO rule, did not comply with Commission rules made under section 20.9;
(b) that the ISO rule is technically deficient;
(c) that the ISO rule does not support the fair, efficient and openly competitive operation of the market;
(d) that the ISO rule is not in the public interest.
Several MPs availed themselves of this opportunity but the AUC ultimately concluded in AUC Decision 2013-025 that (at para 1) it had “not been persuaded that the rule is against the public interest or the fair, efficient and openly competitive operation of the electricity market in Alberta or that the rule is technically deficient.” Several MPs thereupon sought and were granted leave to appeal the AUC’s decision on two grounds: (1) did the AUC err in law in its interpretation of s.29 of the EUA by finding that the Operator was required by statute to provide system access service to intertie operators; and (2) did it err in law in its interpretation of s.16 and/or s.27 of the Transmission Regulation, Alta Reg 86/2007 (TReg)? In this decision the Court of Appeal dismissed those appeals thereby confirming both the AUC Decision and the ISO Rule. Both grounds of appeal seem to have been argued under s.20.4(d) of the EUA and on the basis that an unreasonable interpretation of any of the above provisions would necessarily result in a conclusion that was not in the public interest. There was also a more general public interest argument which is discussed in the final paragraphs of this post.
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