Section 14. Any town, either by a majority vote of its board of selectmen and a majority vote of the school committee or by vote in town meeting duly called therefor, may create a special unpaid committee to be known as a regional school district planning committee, to consist of 3 members, including 1 member of the school committee to be appointed by the moderator. At the same meeting or at a subsequent meeting, the town may appropriate for the expense of the regional school district planning committee such sums, not exceeding 1/10 of 1 per cent of the assessed valuation of such town in the preceding year, as it may deem necessary. Regional school district planning committees from any 2 or more towns may join together to form a regional school district planning board. Such regional school district planning board shall organize forthwith upon its formation by the election of a chairman and secretary-treasurer.