The Board of Selectmen is initiating a search for a new town counsel, and is advertising a request for proposals for an individual or firm interested in providing the legal service, according to Joseph R. Pacheco, board chairman. He said proposals would be due in mid-September. In Raynham, the town counsel serves as a vendor, rather than a town employee, and is appointed on a yearly basis. Marc Antine, who had served as Raynham’s town counsel since the late 1970s, retired late last month. Selectmen at the time appointed him special counsel, enabling him to function as counsel until his replacement takes over.