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Last year, the Electricity Authority began consulting the industry on potential changes.

From July, the country's big four energy companies, or gentailers, will have to comply with new regulations aimed at ensuring there is a level playing field for future hedging contracts.

Last year, the Electricity Authority began consulting the industry on changes to regulations around transparency and the use of supply risk management contracts, or hedges.

Hedging, or fixed-price future contracts, is a tool retailers can use to protect themselves from spikes in the electricity spot price market during generation shortages.