Any party may attend a technical seminar but the session must not be used to test the methodology, assumptions used or conclusions drawn, as these matters should be considered in the hearing sessions.
O'r herwydd, dylid dehongli newidiadau yn ofalus a dylai defnyddwyr osgoi dod i gasgliadau arnynt neu eu defnyddio i lywio prosesau cynllunio neu werthuso polisïau.