Voters at fall Town Meeting, which convenes Oct. 29, will consider two warrant articles regarding medical marijuana. One calls for adopting a zoning bylaw that would allow medical marijuana dispensaries by special permit in industrial districts, but not allow them in other parts of town. The other would extend the town’s existing moratorium on dispensaries, which is set to expire late next month, until the end of the fiscal year, June 30, according to John Charbonneau, the town’s director of planning and development. The two articles will be the subject of public hearings at the Planning Board’s 6 p.m. meeting Thursday. The board will also hold hearings on two other articles on the Town Meeting warrant: One would amend the sign bylaw, and the other would amend the bylaw that allows the keeping of one fowl per 2,500 square feet in residential areas to exclude roosters, peacocks, and guinea hens.