It should be borne in mind that, in the light of the principles of equal treatment and sound administration, EUIPO must, when examining an application for registration of an EU trade mark, take into account the decisions already taken in respect of similar applications and consider with especial care whether it should decide in the same way or not. However, the way in which the principles of equal treatment and sound administration are applied must be consistent with respect for legality. (curia.europa.eu)
principle of equal treatment: principio de igualdad de trato
principle of sound administration: principio de buena administración