Payments made under the non-domestic Renewable Heat Incentive (RHI) will stop next year if new regulations are not introduced, Department for Economy permanent secretary Noel Lavery has confirmed.In a letter to Renewable Heat Association for NI (RHANI) executive chair Andrew Trimble last week, Lavery said that the current temporary regulations “were time limited and, upon expiry, made no provision for an ongoing tariff to be paid” after March 2019.