Chapter — Billuart, Summa Summae · from Schola Thomistica
On the Change of Laws
3.
A law can be mutated in many ways: 1° by abrogation, if it be taken away in whole, or by derogation, if in part;
Lex multipliciter mutari potest : 1° per abrogationem, si tollatur in toto, aut per derogationem, si tollatur ex parte;
4.
2° by cessation of its end; 3° by custom; 4° by dispensation; 5° by interpretation. Of all which we shall treat in this last dissertation.
2° per cessationem finis illius; 3° per consuetudinem; 4° per dispensationem; 5° per interpretationem. De quibus omnibus agemus in hac ultima dissertatione.