Special Town Meeting voters on Monday night gave the Board of Selectmen full authority to sell or lease the former Central Fire Station property. The issue was one of six warrant articles, all of which were approved by the fall session; the others included spending $70,000 to replace the Crabtree waste-water pumping station, and allocating $45,000 to upgrade the town offices’ telephone system. The meeting attracted 70 of the town’s 5,081 registered voters. The next decision facing voters is whether to reduce the Board of Selectmen from five members to three, which will be decided in a special election Tuesday. The proposal was approved by Town Meeting in May 2012, and by the state Legislature this summer.