The Workplace Relations Minister says Easter trading laws are outdated.

Two Wānaka New World supermarkets are likely to be fined after remaining open on Good Friday and Easter Sunday, in a potential breach of the weekend's trading laws.

A Foodstuffs spokesperson says it was done to make sure people have convenient access to groceries throughout the break.

Brooke van Velden says while people should follow the law, she understands the frustration.

"This law is outdated- and I'm not ruling out looking into it in a longer-term framework."

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