"It is a good sign. It is stretching the definition of accountability and transparency," party spokesman Sanjay Jha told reporters.
He was asked to react on the order and whether it would strengthen the case of AAP government in Delhi to go in for CAG audit of private power companies.
"At the end of the day, in provision of public service, one has to ensure highest level of probity," he said.
The court order has come at a time when the Delhi government, brushing aside objections from power distribution companies (discoms) controlled by Anil Ambani and Tata groups, ordered an audit of their accounts by CAG.