Such vehicles were not previously covered by the smoke-free requirements because they were not wholly or mainly used for work or public transport purposes.
Mae’n ofynnol i arddangos arwyddion ‘Dim ysmygu’ mewn cerbydau a ddefnyddir yn gyfan gwbl neu’n bennaf at ddibenion gwaith neu a ddefnyddir i gludo’r cyhoedd.