§ 120-e. By whom proposed district represented. Until a sewer district of a town is organized as provided by the town law, the supervisor, or a member of the town board appointed by the supervisor, of the town in which the proposed sewer district is located, may act for and on behalf of the people of the territory proposed to be embraced in a sewer district, when requested so to do by a petition in writing signed by not less than five per centum of the voters of such proposed district, at such joint meeting of municipalities and districts; provided, however, that except as otherwise provided by the local finance law, neither the town nor any property within the town, except such property as may be within such proposed district, shall be chargeable with any debt or expenses created by such municipalities or districts acting jointly.