Apache Canada Ltd. says the nearby Zama River has not been affected by the leak.
Midway energy won’t be penalized for incident that spewed 500 barrels of oil into an Alberta field last January.
Bill 2, the Responsible Energy Development Act, will also oversee resource developments from application to reclamation.
More than four million litres of oil spilled from the Rainbow pipeline in April.
A second oil spill in Alberta in less than a month has yet to be contained.