The national section of IVR from the United States is AMINTAPHIL (American Section of the International Association for Philosophy of Law and Social Philosophy). The current President of AMINTAPHIL is Mortimer Sellers at the University of Baltimore Law School.
AMINTAPHIL has a website at the Philosophy Documentation Center: http://www.pdcnet.org/amintaphil
See also AMINTAPHIL Agora: https://amintaphil.wordpress.com/
Executive Director: Ann Cudd, University of Kansas, e-mail: firstname.lastname@example.org