The A483 and A489 Trunk Roads (Newtown, Powys) (Prohibition of Entry to Vehicles and Restriction of Waiting on Lay-bys) Order 2019 / Gorchymyn Cefnffyrdd yr A483 a’r A489 (Y Drenewydd, Powys) (Gwahardd Cerbydau rhag cael Mynediad a Chyfyngu ar Aros ar Gilfannau) 2019