When in the written opinion of the registrars of any municipality, the lack of an existing convenient or suitable polling place within the lines of a particular voting district necessitates the designation of a polling place in an adjacent district, such registrars may designate a convenient and suitable polling place in a voting district adjacent thereto, located as near as possible to the boundaries of the voting district for which designated. A separate location from the existing polling place for such adjacent district shall be designated, except that a separate room within such existing polling place may be designated. Such written opinion and designation shall be filed with the municipal clerk not later than ninety days before a regular election, or primary. Within ten days after such filing, the municipal clerk shall cause notice of such filing to be published in the newspaper having the greatest circulation in the town. Such designation shall remain in effect for future elections and primaries, until the registrars file a document with the municipal clerk stating that the designation of such polling place in an adjacent district is no longer necessary.