Directions authorised by Article 4 of the Town and Country Planning (General Permitted Development) Order 1995 are used to remove certain permitted development rights.
Defnyddir cyfarwyddydau a awdurdodir gan Erthygl 4 o Orchymyn Cynllunio Gwlad a Thref (Datblygu Cyffredinol a Ganiateir) 1995 i ddileu rhai hawliau datblygu a ganiateir.