Voters at a Special Town Meeting on Tuesday will consider a proposed zoning change needed for Penn National Gaming to develop a slot machine parlor on a 30-acre site off Route 133. The meeting will be held at 7 p.m. at the high school gym. Penn National is proposing a $200 million development that would include 1,250 slot machines, restaurants, and other entertainment venues. The zoning change would allow for an entertainment use in the area now zoned for business. Selectmen on July 19 unanimously approved a host agreement with Penn National Gaming. If the zoning change is approved, the town would hold a special election Sept. 21 for voters to take up a referendum on whether they support the plan. Approval of a host agreement and a positive vote in a referendum are the two key local requirements an applicant needs to meet to be eligible for the sole license the state is offering for a slot machine parlor.