Normally, it comprises of the 5 Regional Returning Officers, who currently have a formal role in relation to the Senedd’s 5 electoral regions.
Fel arfer, mae’n cynnwys y pum Swyddog Canlyniadau Rhanbarthol, sydd â rôl ffurfiol ar hyn o bryd mewn perthynas â phum rhanbarth etholiadol y Senedd.