non fecit vastum contra prohibitione

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
NON FECIT VASTUM CONTRA PROHIBITIONEM. The name of a plea to an action 
founded on a writ of estrepement, that the defendant did not commit waste 
contrary to the prohibition. 3 Bl. Com. 226, 227. 
    

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