GuideOne Center For Risk Management Van Safety site has info that will assist you with your transportion decisions of today.  Your organization should also know that since there has been well known, established litigation against the use of 15 passenger vans for the transportation of people, any use from this point forward puts your organization, its directors, officers, employees, volunteers, drivers, and other connected persons at high risk for possible litigation and as well as the possible danger of punitive  litigation. Many states have banned their use to haul people. For other states, prohibitions for use are pending, as it is, with the Federal Government.  www.guideonecenter.com/churchandschool/vansindex.htm   also note this related page   www.nasdpts.org/papervans.html