93. Necessity for expression of double contingency.

The double contingency in the cases previously mentioned1 must be so expressed in the instrument2. A gift single in point of expression cannot be split, even though it may include two or more events one of which may or does happen within the limits of the perpetuity rule3.

An exception to this rule exists in the case of limitations taking effect before 1 January 19264. This exception is founded on the principle of real property law that, if a devise could take effect as a remainder, it should do so. Where a gift over, single in expression, could, in the