53 Pa.C.S. § 2944

A referendum on the question of the amendment of a home rule charter or an optional plan of government shall be held when the election officials find that the initiative petition or ordinance of the governing body is in proper order. The referendum shall be governed by the provisions of the act of June 3, 1937 (P.L.1333, No.320), known as the Pennsylvania Election Code. The election officials shall cause the question to be submitted to the electors at the next primary, general or municipal election occurring not less than the 13th Tuesday following the filing of the initiative petition or ordinance with county board of elections. At the election, the question shall be submitted to the voters in the same manner as other questions are submitted under the Pennsylvania Election Code. The county board of elections shall frame the question to be placed upon the ballot.