SI 2019/1052. The Renewable Heat Incentive Scheme and Domestic Renewable Heat Incentive Scheme (Amendment) Regulations 2019. Comes into force 17th July. This instrument amends the Domestic Renewable Heat Incentive Scheme Regulations 2014 (SI 2014/928) and the Renewable Heat Incentive Scheme Regulations 2018 (SI 2018/611). SI 2014/928 is amended to adjust the expenditure thresholds in Schedule 6 to align the triggers to the latest deployment assumptions. SI 2018/611 is amended to extend the availability of tariff guarantees to 31 January 2021 (Reg 35) and the expenditure thresholds in Schedule 7 in order to align the triggers to the latest deployment assumptions.