Mae’r Llywodraeth wedi ystyried hefyd sut y mae am ddelio ag is-ddeddfwriaeth.Bydd angen blaenoriaethu is-ddeddfwriaeth i ymateb i COVID-19. Hefyd, bydd angen swm arwyddocaol o is-ddeddfwriaeth â blaenoriaeth i ymateb i ddiwedd y cyfnod pontio Ewropeaidd. A bydd yn rhaid cyfreithiol wrth beth deddfwriaeth p’run bynnag neu am resymau eraill.
The Government has also considered its approach to subordinate legislation. There will be a need for priority subordinate legislation to respond to COVID-19. In addition, there will be a need for a significant volume of priority subordinate legislation to respond to European transition. And some legislation will be a legal necessity that would need to be made under any circumstances, or essential for another reason.