(a) approved by the Forestry Commission or NRW under a forestry dedication covenant under section 5 of the Forestry Act 1967, or
(a) a gymeradwyir gan y Comisiwn Coedwigaeth neu CNC o dan gyfamod neilltuo coedwigaeth o dan adran 5 o Ddeddf Coedwigaeth 1967, neu