Public-domain · open source
OpenJurist

Non Est Regula Quin Fallat

Defined in 2 dictionaries — Cyclopedic (1922), Ballentine's (1916)

The Cyclopedic Law Dictionary

Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922

There is no rule but what may fail. Off. Exec. 212.

Ballentine's Law Dictionary

James A. Ballentine · 1916

There is no rule which may not fail.