The rate change would shift costs so that condo owners, and owners of stores, offices, and government properties pay more.  The new rates would be based on how much traffic a property generates — a novel, relatively untested method that city commissioners said they aren’t sure they agree with. The idea was proposed by consultant Burton & Associates, Inc., which conducted a rate study for the city. Commissioners rejected the suggestion last summer but subsequently agreed to reconsider.   Read the article……………