Where the author of a power has directed any formalities to be observed in its execution, in addition to those which would be sufficient to pass the estate, the observance of such additional formalities is not necessary to a valid execution of the power.

Source: CivC 1877, § 322; CL 1887, § 2838; RCivC 1903, § 345; RC 1919, § 413; SDC 1939, § 59.0426.