The changes laid out by the Border Target Operating Model will be phased in gradually, beginning with the pre-notification and certification process in January 2024.
Bydd y newidiadau a nodir gan y Model Gweithredu Targed y Ffin yn cael eu cyflwyno'n raddol, gan ddechrau gyda'r broses raghysbysu ac ardystio ym mis Ionawr 2024.