The legislation comes after regulators reported an unexplained 10 to 13 cent premium on Lower Mainland fuel prices.

A follow-up to August's gas price inquiry says industry has failed to explain why the Lower Mainland pays 13 cents more per litre than the Pacific Northwest.

The legislation is a reaction to a public inquiry that found an "unexplained difference” of about 13 cents per litre in prices at the pumps in Metro Vancouver.

Prices at some gas stations around Vancouver were as high as $1.589 on Wednesday morning.

The unexplained differential is costing B.C. drivers nearly half a billion dollars per year, the report found.

Metro Vancouver gas prices are expected to crawl past $1.50 per litre for the first time in weeks on Friday morning.

One of B.C.'s biggest fuel companies testified that market competition is so tight in the province that collusion among suppliers would be impossible.

The B.C. Utilities Commission has until the end of July to dig into the factors behind the region's sky-high prices.

The report says Vancouver's gasoline retail margins "highly" correlates with local land values.

John Horgan says he's hopeful the larger oil and gas companies will eventually share their retail and refining margins with the provincial gas price inquiry.