The parts of the legislation that set out the details are section 11 of the 2017 Act and regulations 11 and 12 of the 2020 Regulations.
Y rhannau o'r ddeddfwriaeth sy'n nodi'r manylion yw adran 11 o Ddeddf 2017 a rheoliadau 11 a 12 o Reoliadau 2020.