That the structure is whitened (ground level to a minimum of 2.3 metres) and is erected within 400mm of the kerb edge (allowing for vehicular overhang).
Bod y strwythur yn cael ei wynnu (lefel daear i leiafswm o 2.3 metr) ac yn cael ei godi o fewn 400mm o ymyl y cwrbyn (gan alluogi cerbydau i orhongian).