Stakeholders have also highlighted that the fixed closed periods are relatively easy to enforce, and an alternative approach may lead to a lack of clarity over the requirements.
Hefyd, mae rhanddeiliaid wedi nodi bod y cyfnodau gwaharddedig sefydlog yn gymharol hawdd i'w gorfodi, ac y gallai dull gweithredu amgen arwain at ddiffyg eglurder yn ymwneud â'r gofynion.