Norms in Branching Space-Times -- Changing Legal Systems: Abrogation and Annulment Part I: Revision of Defeasible Theories -- Acting, Events and Actions -- A Tableaux System for Deontic Action Logic -- Information Security Economics - and Beyond -- Trust and Norms in the Context of Computer Security: A Logical Formalization -- Specifying Intrusion Detection and Reaction Policies: An Application of Deontic Logic -- Delegation of Control in Administrative Procedures -- Variations in Access Control Logic -- Reasoning about Conditions and Exceptions to Laws in Regulatory Conformance Checking -- Need to Know: Questions and the Paradox of Epistemic Obligation -- A Logical Analysis of the Interaction between ‘Obligation-to-do’ and ‘Knowingly Doing’ -- Reactive Kripke Models and Contrary to Duty Obligations -- Normative Consequence: The Problem of Keeping It Whilst Giving It up -- On the Strong Completeness of Åqvist’s Dyadic Deontic Logic G -- Strata of Intervenient Concepts in Normative Systems -- A Deontic Logic for Socially Optimal Norms -- Praise, Blame, Obligation, and Beyond: Toward a Framework for Classical Supererogation and Kin -- Introducing Grades in Deontic Logics -- Pushing Anderson’s Envelope: The Modal Logic of Ascription.