Roedd y cyd-ymgynghoriad yn ymdrin â sawl trefn, gan gynnwys Rheoliadau Asesu Effeithiau Amgylcheddol (Coedwigaeth) (Cymru a Lloegr) 1999 ("y Rheoliadau") sy'n rheoli prosiectau coedwigaeth yng Nghymru a Lloegr. O dan y Rheoliadau, mae angen caniatâd Cyfoeth Naturiol Cymru ("CNC") i gynnal prosiectau coedwigaeth penodol gan gynnwys plannu coetiroedd newydd o fath, maint a lleoliad sy'n debygol o gael effaith arwyddocaol ar yr amgylchedd.  Os oes angen caniatâd, rhaid i gynigydd y prosiect gynnal asesiad o'r effaith amgylcheddol
The joint consultation covered several regimes including forestry, which is governed by the Environmental Impact Assessment (Forestry) (England and Wales) Regulations 1999 (“the Regulations”).  Under the Regulations consent of Natural Resources Wales (“NRW”) is needed for forestry projects including new woodland planting of a nature, size or location likely to have a significant effect on the environment.  Where consent is required, an environmental impact assessment must be carried out by the project proposer.