immemorial usage
A usage that has existed for a very long time; long-standing custom. See TIME IMMEMORIAL. [Cases: Customs and Usages 1. C.J.S. Customs and Usages § 1.]
A usage that has existed for a very long time; long-standing custom. See TIME IMMEMORIAL. [Cases: Customs and Usages 1. C.J.S. Customs and Usages § 1.]