Nes y cytunir ar fframwaith cyllidol sy'n deg i Gymru ac yn pennu'n glir beth yw'r trefniadau cyllidol tymor hir, ni fyddwn mewn sefyllfa i allu ystyried y cyfle am ddatganoli mwy sylweddol o ran trethi, sef yr hyn a gynigir gan y pwerau dros dreth incwm a ddarperir gan Ddeddf Cymru 2014.
Until a fiscal framework is agreed that is fair to Wales and provides long term clarity about fiscal arrangements, we will not be in a position to consider the opportunity for more significant tax devolution which is offered by the powers over income tax provided by the Wales Act 2014.