The general rule is that, unless expressly authorised to act by majority, trustees must act unanimously. However, personal representatives are generally treated differently. In particular, co-executors are treated in law as an individual person, such that, as a general rule, a power given to co-executors will be regarded as exercisable jointly and severally and by the survivor. Thus, the act of one joint executor is regarded as to the act of all and is binding. This principle that the act of one representative is the act of all applies to the sale or gift of pure personality. There are, however, exceptions to this general rule,