The percentage shall be based on the number of voters in the municipality at the last preceding general election

Each voter shall add to the voter's signature the voter's place of residence, including street and house number, if any, and the date of signing. The referendum petition shall be verified in the same manner as a petition to initiate a law except that the person verifying shall state that each person signing the petition is a resident and registered voter of the municipality or special annexation precinct. No signature on the petition is valid if signed more than six months prior to the filing of the petition. Source: SL 1979, ch 47 , § 8; SL 1983, ch 52 , § 1; SL 1988, ch 63 , § 4; SL 2000, ch 19 , § 2.