They apply to all food or feed producers, including those rearing animals for food or products of animal origin (e.g. eggs or milk).
Rhaid i bawb sy’n cynhyrchu bwyd neu borthiant gadw at y rheolau hyn, gan gynnwys pawb sy’n magu anifeiliaid i’w bwyta neu i gynhyrchu bwyd (er enghraifft wyau a llaeth).