Bydd y broses benodi yn seiliedig ar egwyddorion sydd wedi’u sefydlu dros amser, sef tryloywder a didueddrwydd, gyda phenodiad ar sail teilyngdod. Mae’r rheoliadau yn gosod dyletswydd ar Brif Weinidog Cymru, wrth benodi'r Comisiynydd, i ddilyn egwyddorion cyfrifoldeb Gweinidogion; teilyngdod; craffu annibynnol; cyfle cyfartal; uniondeb; didwylledd a thryloywder; a chymesuredd gan gymryd i ystyriaeth y disgrifiad o'r egwyddorion hynny yng Nghod Ymarfer y Comisiynydd Penodiadau Cyhoeddus ar gyfer Penodiadau gan Weinidogion i Gyrff Cyhoeddus.
The selection process will be based on long-established principles of openness and impartiality, with appointment based on merit. The regulations impose a duty upon the First Minister, in appointing the Commissioner, to follow the principles of Ministerial responsibility; merit; independent scrutiny; equal opportunities; probity; openness and transparency; and proportionality, taking into account the description of those principles set out in the Commissioner for Public Appointments’ Code of Practice for Ministerial Appointments to Public Bodies.