The role of the sub-regional Technical Advisory Group (TAG) is to collect, collate, and analyse data used to present options for approval by the Boards.
Rôl y Grŵp Cyngor Technegol is-ranbarthol yw casglu, coladu a dadansoddi data a ddefnyddir i gyflwyno opsiynau i'w cymeradwyo gan y Byrddau.