The relevant powers are Sections 60 and 71 of the Government of Wales Act 2006, and Section 1 of the Welsh Development Agency Act 1975 (as amended).
Y pwerau perthnasol yw Adrannau 60 a 71 o Ddeddf Llywodraeth Cymru 2006, ac Adran 1 o Ddeddf Asiantaeth Datblygu Cymru 1975 (fel y'i diwygiwyd).