Wrth ein helpu i lunio’r FfERhau, mae swyddogion wedi cynnal cyfnod o ymgysylltu â rhanddeiliaid allweddol penodol ar lefel genedlaethol a rhanbarthol ym mhob un o ranbarthau Cymru gan feithrin perthynas waith agosach ag Awdurdodau Lleol i gyd-ddylunio datblygiad economaidd sy’n seiliedig ar le. Gwneir hynny trwy un weledigaeth ar y cyd ar gyfer pob rhanbarth, gyda set o flaenoriaethau rhanbarthol i gefnogi’r weledigaeth honno. Yn sail i hyn y mae’r egwyddor nad yw’r  rhanbarthau yn ddarostyngedig i’r cenedlaethol o ran y blaenoriaethau y maent wedi cytuno arnynt o dan yr egwyddorion cytûn, a rhaid tanlinellu pwysigrwydd parchu sybsidiariti ac atebolrwydd democrataidd ar wahanol lefelau cenedlaethol, rhanbarthol a lleol.
In helping shape the emerging REFs, officials have undertaken a period of targeted engagement with a range of key stakeholders at national and regional  levels in each of the regions of Wales, with closer working relationships fostered with Local Authorities to co-design a placed-based approach to economic development. Delivery will be focussed around a single shared vision for each region and supported by a suite of shared regional priorities. Underpinning this will be the principle that regions are not subordinate to the national level in respect of their own priorities agreed under shared principles, and we must make paramount the importance to respect subsidiarity and democratic accountability at different national, regional and local levels.