This Order comes into force on 6 January 2010 and its title is The Cardiff to Glan Conwy Trunk Road (A470) (Cwm-bach to Newbridge-on-Wye) (Side Roads) Order 2009.
Daw’r Gorchymyn hwn i rym ar 25 Mehefin 2009 a’i enw yw Gorchymyn Cefnffordd Abergwaun I Fangor (Yr A487) (Ffordd Osgoi Porthmadog, Minffordd A Thremadog) (Ffyrdd Ymyl) 2009.