No demolition operation should commence unless we have given a notice under Section 81 or six weeks has elapsed since the giving notification as to the intention to commence a demolition operation.
Ni ddylid dechrau dymchwel dim byd oni bai ein fod ni wedi rhoi hysbysiad o dan Adran 81 neu hyd nes bod chwe wythnos wedi mynd heibio ers i ni hysbysu am y bwriad i ddechrau dymchwel.