Can. 1503
© Libreria Editrice Vaticana Source: vatican.va
In dubio revocatio legis praeexsistentis non praesumitur, sed leges posteriores ad priores trahendae sunt et his, quatenus fieri potest, conciliandae.
Wording unchanged since the Code took effect in 1991.
Read the whole title TITULUS XXIXDe Lege, de Consuetudine et de Actibus Administrativis 1488–1539