The 17th Trends in Logic international conference will be held at The John Paul II Catholic University of Lublin, Poland, from September 12 to September 15, 2017 under the title “Traditional and new perspectives on deontic logic and agency modeling”. It is organized by the Department of the Foundations of Computer Science at the Faculty of Philosophy of the John Paul II Catholic University of Lublin, in co-operation with the journal Studia Logica (see http://www.studialogica.org and http://link.springer.com/journal/11225). We call for relevant contributions applying the different approaches to: deontic logic, normative aspects of action theory, formal ethics,legal theory, handling norms in computer systems. A special session on obligations derived from permissions, related to the a special issue of Studia Logica, will be a part of the conference. Extended abstracts of a length between 1 and 3 pages (including references), which will undergo a short reviewing process should be submitted in LaTeX preferably (but not mandatorily) according to the Trends style, available for downloading at http://www.studialogica.org. All papers should be submitted via EasyChair (https://easychair.org/conferences/?conf=trends2017), by May 31, 2017. At least one of the authors of an accepted paper must register for and attend the conference for the contribution to be presented.