it is within a distance of 3 kilometres from the perimeter of a scheduled monument and is 75 metres or more in height, or has an area of 1 hectare or more; or
bod o fewn pellter o 3 cilometr o berimedr heneb gofrestredig ac yn 75 metr o uchder neu’n uwch, neu gydag arwynebedd o 1 hectar neu fwy; neu