commutative justice

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
COMMUTATIVE JUSTICE. That virtue whose object is, to render to every one 
what belongs to him, as nearly as may be, or that which governs contracts. 
     2. The word commutative is derived from commutare, which signifies to 
exchange. Lepage, El. du Dr. ch. 1, art. 3, Sec. 3. See Justice. 
    

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