Subsidies should be an appropriate policy instrument for achieving their specific policy objective and that objective cannot be achieved through other, less distortive, means.
Dylai cymorthdaliadau fod yn offeryn polisi priodol i gyflawni eu hamcan polisi penodol ac ni ddylai fod modd cyflawni'r amcan hwnnw drwy ddulliau eraill, llai gwyrdroadol.