Mae gweithfeydd ynni o wastraff ar raddfa fawr yn golygu gweithfeydd 10MW neu fwy a daw’r moratoriwm ar y rheini i rym ar unwaith.  Ni chaiff gweithfeydd ynni o wastraff bach o dan 10MW eu caniatáu chwaith oni gall yr ymgeisydd brofi bod seilwaith o’r fath yn angenrheidiol i drin gwastraff anailgylchadwy’r rhanbarth.  Rhaid i unrhyw gyfleusterau bach newydd gynhyrchu gwres hefyd, a lle medrir, byddant yn gallu neu â’r potensial i ddal a storio carbon.  Ni chaniateir gwaith ynni o wastraff bach chwaith os mai’r bwriad yw mewnforio’r gwastraff o’r tu allan i’r rhanbarth dan sylw (ac eithrio’n agos iawn i’r rhanbarth), rhag cynhyrchu allyriadau cludiant a llygredd cysylltiedig.  Daw’r moratoriwm i rym trwy’r system gynllunio.  Dywed Polisi Cynllunio Cymru y bydd y graddau y gall cynnig ddangos ei fod yn cyfrannu at amcanion, polisi, targedau ac asesiadau rheoli gwastraff a geir yn y polisi gwastraff cenedlaethol yn ystyriaeth berthnasol.
The moratorium on new large scale energy from waste plants will cover those of 10MW or greater and comes into effect immediately. Small scale energy from waste plants of less than 10MW will also only be allowable if the applicant can demonstrate the need for such a facility for the non-recyclable wastes produced in the region. Any new small scale facilities must also supply heat, and where feasible, be carbon capture and storage enabled or ready. This will therefore mean a small scale plant would not be allowable if waste is to be imported from outside of the proposed region (unless in close proximity to a region), in order to also avoid locking in transport emissions and associated pollution. This moratorium is being given effect through the planning system. Planning Policy Wales states that the extent to which a proposal demonstrates a contribution to waste management objectives, policy, targets and assessments contained in national waste policy will be a material consideration.