Following the petition, there shall be the signatures of the petitioners who shall be registered voters of the County. Opposite the signature of each signer, there shall appear the residential address of the signer in the county. Below the signature of each signer, the signer's name shall appear in print or type lettering.
Below the signatures on each sheet of the petition, there shall appear an affidavit stating that each signature on the sheet was affixed in the presence of the affiant and that each signature is the signature of the signer affixed by voluntary act of the signer.
All sheets duly filed of a petition for a referendum on the same act shall constitute a single petition for a referendum on that act. The total number of signatures of different registered voters attached to the sheets constituting a single petition shall be not less than the number required by the charter. The number of required signatures must be computed by using the number of registered voters shown in the records of the board of supervisors of elections on the day the act becomes law. (Mont. Co. Code 1965, § 9-15; L.M.C., ch. 32, § 3; 1976 L.M.C., ch. 31, § 1; 1984 L.M.C., ch. 34, § 1.)