A Topic of Moral Theology
Collision of Laws
Collision of Laws, as treated in McHugh–Callan (Art. 1. Law in General).
In the index as Law · Justice · Rights
In the manuals
Moral Theology: A Complete Course (McHugh & Callan)
Vol. I, Pt. I, Q. III, Art. 1. Law in General, Collision of Laws, nn. 288, 289, 290, 291 & 292 (5 passages — hover a number to read it)
Treated under the broader heading The divisions of law — Noldin, Summa of Moral Theology · Slater, Manual of Moral Theology · Wouters, Manual of Moral Theology · Vermeersch, Theologia Moralis · Prümmer, Manuale Theologiae Moralis · Merkelbach, Summa Theologiae Moralis · Sabetti-Barrett, Compendium of Moral Theology · Billuart, Summa Summae — these works do not divide the matter as finely as we do here, so their treatment stands one heading up (ed.)