EDMONTON — Alberta is reviving its so-called turn-off-the taps legislation, but with a few changes.

Environment Minister Jason Nixon says a proposed bill with revisions would be retroactive to May 1, when the previous act expired following a two-year sunset clause.

The original legislation was crafted by Alberta’s former NDP government and proclaimed as the first act of Premier Jason Kenney’s United Conservative government in April 2019.

It was to be used as a last resort against British Columbia to restrict the flow of oil and gas to that province in a dispute sparked by B.C.'s reluctance to co-operate with construction of the Trans Mountain pipeline expansion.

B.C. has since given in, but Alberta Environment Minister Jason Nixon says it’s prudent to have such legislation in case others seek to limit Alberta’s legal ability to develop its resources.

The bill removes references to blocking refined fuels and instead asserts Alberta’s authority over its primary natural resources — changes Nixon says bring the legislation more in line with constitutional protections.

“This shows Alberta is serious, that we have a serious law in place,” Nixon said Tuesday before the bill was introduced in the house.

“This is like a fire extinguisher, having it on the shelf ready to go. Hopefully, we never need it, but we need to have it in place.”

B.C. challenged the legislation after Kenney’s government proclaimed it and later won an injunction in court against it on the grounds it would cause irreparable harm.

Last month, the Federal Court of Appeal set aside the injunction. It called it ''premature'' because Alberta hadn't yet used the legislation.

The court said without regulations and a licensing scheme from Alberta, the court could not assess the constitutional validity of the law.

This report by The Canadian Press was first published May 25 2021.

The Canadian Press