Fel rhan o broses gystadleuol deg ac agored i benderfynu ble i roi’r polisi ar waith yng Nghymru, cyhoeddodd Llywodraeth Cymru a Llywodraeth y DU brosbectws ar y cyd, sy'n nodi amcanion y polisi y mae'r ddwy lywodraeth yn ceisio eu cyflawni drwy’r rhaglen porthladdoedd rhydd.
As part of a fair and open competitive process to determine where the policy should be implemented in Wales, the Welsh Government and UK Government jointly published a prospectus, which set out the policy objectives both governments seek to achieve through the establishment of the freeport programme.