Mae Atodlen 29 yn gymwys i hysbysiadau a gyflwynir yn ystod y cyfnod perthnasol, a oedd i fod i ddod i ben ar 31 Rhagfyr 2021. Caiff Gweinidogion Cymru estyn y cyfnod perthnasol y tu hwnt i 31 Rhagyfr 2021 gan ddefnyddio'r pwerau a nodir ym mharagraffau 1(2) a 14(1) o Atodlen 29.
Schedule 29 applies to notices served during the relevant period, which was due to end on 31 December 2021. The relevant period may be extended by the Welsh Ministers beyond 31 December 2021 using the powers set out in paragraphs 1(2) and 14(1) of Schedule 29.