Any petition of the voters for an amendment of the charter shall be composed of one (1) or more sheets, each in substantially the following form:
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"PETITION FOR AMENDMENT OF
MONTGOMERY COUNTY CHARTER"
MONTGOMERY COUNTY CHARTER"
"We, the undersigned registered voters of Montgomery County, Maryland, do hereby petition for a referendum vote at the next regular, general or congressional election occurring after the filing of this petition on the following proposed amendment of the Montgomery County charter: (setting forth the complete text of proposed amendment)." (Mont. Co. Code 1965, § 2-1; 1968 L.M.C., Ex. Sess., ch. 8, § 1.)