The Domestic Renewable Heat Incentive Scheme (Amendment) Regulations 2018. Comes into force 22nd May. These Regulations amend the Domestic Renewable Heat Incentive Scheme Regulations 2014 (SI 2014/928). These Regulations insert a new Part 3A, which provides for the assignment of the right to receive RHI payments. They introduce requirements for heat pumps to have electricity meters installed and exclude meters fitted to comply with those requirements from metering and meter positioning requirements. They simplify the calculation of a plant’s initial tariff and they change the structure of metering and monitoring agreement payments. They withhold metering and monitoring payments where there are reasonable grounds to suspect that specified metering and monitoring registration requirements are not being met.