I fully expect we will prevail at the Supreme Court," he said. Former Gov. Jay Inslee, who campaigned against the measure, attended Friday's hearing. Initiative 2066, which voters approved in November, aims to unwind changes to the energy code, approved by the state Building Code Council, that went into effect a year ago. Those rules offer builders of homes and commercial buildings permitting incentives for choosing heat pumps – which provide both heating and cooling in the same unit – instead of natural gas furnaces. The measure also repealed provisions in a 2024 state law, House Bill 1589, intended to accelerate Puget Sound Energy's transition away from natural gas. The initiative requires utilities and local governments to provide natural gas to eligible customers and it prevents approval of utility rate plans that end or restrict access to natural gas, or make it too costly.