Catechism of the Catholic Church §1957 — excerpt
Application of the natural law varies greatly; it can demand reflection that takes account of various conditions of life according to places, times, and circumstances.
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.