The Bethel Board of Selectmen is hosting a special meeting tonight to develop a policy for this year about displays on municipal land.  This stems from an uproar over their decision to allow a new nativity manger to be displayed at P.T. Barnum Square.  There is no written policy of regulations for displays, just a history of past practices.  When First Selectman Matt Knickerbocker took office he stopped allowing town crews to set up the manger donated by a resident, and the Chamber of Commerce took over the task.  This year the Chamber asked local churches to be in charge.  Tonight's meeting is at 6pm at the municipal center.