The plan of merger shall include provisions relating to structure, organization, functions, operation, finance, property, and other appropriate matters; shall include special provisions contained in a charter of any municipality included in the plan, which provisions are peculiar to that municipality, and which it is desired to retain as charter provisions of the consolidated municipality; and shall include adequate provisions for the satisfaction of all obligations of the parties concerned. The plan shall provide that any area or group of voters in the consolidated municipality or town may have special services, not common to all the voters in the municipality or town, provided for them, if so voted. All costs of whatever nature required to support these special services shall be paid for by the taxpayers receiving these services, by a tax on their grand list, to be assessed annually by the selectboard or the equivalent officers of a municipality, or in such other manner as the selectboard or the equivalent officers of a municipality shall determine. If the costs are to be paid by a tax, such tax shall be paid and collected in the same manner as other taxes and such tax assessed on their grand list shall be a lien thereon. (Added 1965, No. 184, § 2(b); amended 1966, No. 31 (Sp. Sess.), § 1, eff. March 12, 1966.)