The Police Commission voted unanimously Wednesday night to require the organizers of the Pup Up Park to return next month with proof of insurance and coordination with the town in order to retain a planned six-week road closure needed to operate the makeshift gathering space. In the past, officials noted during the Commission’s regular meeting, the New Canaan Chamber of Commerce had provided insurance and also coordinated with the town, though a separate, small group of volunteers oversaw the actual day-to-day operation of the summer park at South and Elm. Yet “the sponsoring organization obviously has withdrawn from the entire concept,” Commission Chairman Sperry DeCew said at the group’s regular meeting, held at the New Canaan Police Department. “So at this point, we have a group of five well-meaning citizens who want to have a Pop Up Park, but at this point there is no appointed liaison to the town of New Canaan. So far as we know, there is no approval by the town of New Canaan on the special permit level, and there is certainly no insurance.