An arbitrative board.    From Wordnet, Princeton University. 

Verb (used with object) : to arbitrate a dispute.    From Dictionary.com. 

Or we can explore the tradition I have been trying to work with here and ask what an 'interactive' pluralism would look like, that had thought through what was involved in the state's arbitrative and balancing function in a way which allowed active partnership and exchange between communities themselves and between communities and state authority.    From Wordnik.com.  [David Nicholls Memorial Lecture: 'Law, Power and Peace: Christian Perspectives on Sovereignty'] Reference

Added to this was a tacit claim upon the partners 'arbitrative powers, or the equal right to request them to step outside if the interviews were of a private nature.    From Wordnik.com.  [Stories in Light and Shadow] Reference

Notwithstanding this, the Estates meanwhile assembled, but declared themselves incompetent, regarding themselves simply in the light of an arbitrative committee, and, as such, threw out the constitution presented by the king, June, 1838.    From Wordnik.com.  [Germany from the Earliest Period Volume 4] Reference

102 B R E E D I N a cally, to produce ftock of fliape, ftrength, figure, falhidn, bone, or fpeed, (according to the purpofes for which they are defigned) there will ftill remain a more than moderate proportion of the breeders formerly defcribed, who muft inevitably continue to propagate ftock, not worth the proper fupport of even the firft twelve months, was their intrinfic value to be brought into arbitrative competi - tion with the year's confumption.    From Wordnik.com.  [The gentleman's stable directory, or, Modern system of farriery : comprehending all the most valuable prescriptions and approved remedies, accurately proportioned and properly adapted to every known disease to which the horse is incident ... : to which is now added a supplement containing practical observations upon thorn wounds, punctured tendons, and ligamentary lemeness : with ample isntructions for their treatment an cure : illustrated by a recital of cases, including a variety of useful remarks : with a successful method of treating the canine species, i n that destructive disease called the distemper] Reference