Conn. Gen. Stat. § 7-192a

No provision of this chapter shall be deemed to empower any municipality to levy or collect any tax not authorized by the general statutes or to adopt a charter, charter amendments or home rule ordinance amendments which shall affect matters concerning qualification and admission of electors; duties and responsibilities of registrars of voters; duties and responsibilities of town clerks with respect to electors, voting and elections; forfeiture of electoral rights and restoration of the same; absentee voting; conduct of and procedures at elections; hours of voting; canvass of electors; preliminary, final and supplementary registry lists; warning of elections; election officials and their duties and responsibilities; election canvass and returns; election contests; corrupt practices; prohibited acts with respect to elections; nomination of candidates; adoption and amendment of party rules; primaries; and political parties and enrollment therein.