Legislating to increase that period for those affected by the interruption would introduce complexity which would be out of proportion to the anticipated benefit.
Byddai deddfu i gynyddu'r cyfnod hwnnw ar gyfer y rhai y mae'r bwlch wedi effeithio arnynt yn cyflwyno cymhlethdod a fyddai'n anghymesur â'r fantais ddisgwyliedig.