MSA complaint regarding mothball rule

MSA complaint regarding mothball rule


On March 16, 2018, the Market Surveillance Administrator (MSA) filed a complaint about the Alberta Electric System Operators' independent system operator rules Section 306.7, Mothball Outage Reporting.

The Mothball Rule was implemented by the Alberta Electric System Operator (AESO) in 2016 on an expedited basis, and sets out how and when generators shall report temporary closures of generating facilities of more than five megawatts, for periods up to two years.

In the MSA complaint filed under the Electric Utilities Act, the MSA said it believes the AESO's Mothball Rule does not support the fair, efficient and openly competitive operation of the electricity market, is not in the public interest, and may have an adverse effect on the structure and performance of the market.

The MSA asked the AUC to consider the Mothball Rule, and if it is found to contravene the Electric Utilities Act, to either require the rule to be removed, or to amend it to address adverse effects on the structure and performance of the market and to address the public interest.

On March 27, 2018, the AUC issued and distributed a notice of application related to the proceeding.

The MSA met with the AESO and other stakeholders to reach an agreement concerning the mothball rule (Section 306.7). On May 28, 2018, the AESO filed an amended Section 306.7 to the AUC, in which the MSA agreed to withdraw its complaint with the AESO on an expedited basis, where generators who wish to mothball units must now provide attestation along with their mothball request to the AESO.

Accessing proceeding documents

To view the applications and the other documents that the AUC will be considering in this proceeding please create a username and password and log in to the eFiling System. The system is also used to file submissions and evidence to participate in the proceeding.

To create an account, select "New account" and follow the steps to create a user ID and password. If you have any questions about how to use the system please contact us at or 403-592-4500.

Documents being considered in this proceeding can be found in the eFiling System (which requires log in). Once you have logged in, enter 23427 in the "go to" section at the top left corner of your screen.

Proceeding 23427

Application status: under review

Hearing dates: undetermined/not applicable

Hearing location: undetermined/not applicable



Decision expected: To be determined


eFiling System Login Listen to a hearing

Access all regulatory documents

Anyone can access applications and proceeding information through the eFiling System.

Create a new account or log in below