Part — Koch–PreussPart III: The Commandments of the ChurchContentsChapter I: Object, History, Number, and Obligation of the Commandments of the ChurchChapter II: The Observance of Sundays and Holydays of ObligationChapter III: The Law of Fasting and AbstinenceSection 1: Definition and Significance of FastingSection 2: The Subject-Matter of the Ecclesiastical FastArticle 1: Days of Fasting and AbstinenceArticle 2: In What Fasting and Abstinence ConsistsSection 3: Obligation of the Law of Fasting and AbstinenceChapter IV: The Precept of Annual Confession and CommunionSection 1: The Annual ConfessionSection 2: The Easter CommunionChapter V: The Precept of Contributing to the Support of Church and PastorChapter VI: The Law of the Church Concerning BooksSection 1: The Preventive Censorship of BooksSection 2: The Prohibition of BooksSection 3: The Index of Forbidden Books