in the case of a section 173 notice, at least six months has elapsed since the start of the original occupation date (this is usually the date you moved your home) before giving notice.
o dan adran 173 – yn debyg i adran 21 o Ddeddf Tai 1988) ac ni fyddant yn gallu rhoi hysbysiad o'r fath am o leiaf chwe mis ar ôl i'r contract ddechrau.