". . . and, as such, 'has the exclusive right to display the work.'"
The Toronto Globe and Mail reports that "Canadian artist AA Bronson has brought a lawyer into his dispute with the National Portrait Gallery in Washington, D.C. over the gallery’s refusal to return to Canada one of his works currently in a controversial exhibition there." (This has to do with the Smithsonian "Hide/Seek" dispute. I mentioned Bronson's removal request here.)
Is it possible he's asserting a Costco claim?