Canadian regulators approved the hydrotest results of Enbridge Inc.'s (ENB) Line 9 crude oil pipeline on Sept. 30, clearing the way for the delayed 300,000 barrel per day line to move into operation.

Enbridge said on Sept. 30 it did not have a specific date for return to full service for the newly-reversed Line 9 pipeline, after Canadian regulators gave the delayed project the green light.

"There are still some technical preparations that are required and line-fill is not an exactly timed process, so we will not speculate at this time on a specific date for return to full service," Enbridge spokesman Graham White said.

The newly-reversed Line 9 will ship mainly light crude from Sarnia, Ontario, to Montreal, Quebec, and was held up after the National Energy Board ordered hydrostatic tests at three locations along the line in June.