The parts of the legislation that set out the details are sections 6, 7 and 8 of the 2017 Act and regulation 3 of the 2020 Regulations.
Y rhannau o’r ddeddfwriaeth sy’n nodi’r manylion yw adrannau 6, 7 ac 8 o Ddeddf 2017 a rheoliad 3 o Reoliadau 2020.