The parts of the legislation that set out the details are section 16 of the 2017 Act and regulations 5, 6, 7, 8, 9 and 14 of the 2020 Regulations.
Y rhannau o'r ddeddfwriaeth sy'n nodi'r manylion yw adran 16 o Ddeddf 2017 a rheoliadau 5, 6, 7, 8, 9 a 14 o Reoliadau 2020.