Make the case for clear and stable tax devolution in Wales whilst pursuing agreement with the UK Government on a fit for purpose mechanism for devolving new tax powers to Wales.
Cyflwyno achos dros ddatganoli trethi mewn ffordd glir a sefydlog yng Nghymru a cheisio cytundeb â Llywodraeth y DU ar yr un pryd ynghylch system addas ar gyfer datganoli pwerau trethu newydd i Gymru.