The base must extend over the whole area occupied, and must project a sufficient distance outwards from its entrance or entrances to enable residents to enter and leave safely.
Rhaid i’r sylfaen ymestyn dros yr holl ardal a feddiannir, a rhaid iddi ddangos pellter digonol tuag allan o’r fynedfa neu’r mynedfeydd er mwyn i’r preswylwyr allu mynd i mewn a gadael yn ddiogel.