VERGENNES — Due to differing interpretations of the language of a bond that voters approved in 2022, Vergennes officials say residents might need to weigh in again if they are to borrow the full $25.5 million the city needs to pay for its massive, state-mandated, $42.5 million sewer infrastructure overhaul. A legal opinion given to the city in June indicated that it was acceptable for the city to use up to $25.5 million. But a more recent revise…