Vt. Stat. tit. 24A § 601-53
The Board of Supervisors may authorize the inclusion of additional member municipalities in the District upon terms and conditions as it in its sole discretion shall deem to be fair, reasonable, and in the best interest of the District. The legislative body of any nonmember municipality that desires to be admitted to the District shall make application for admission to the Board of Supervisors of the District. The Board shall determine the effects and impacts that are likely to occur if the municipality is admitted and shall thereafter either grant or deny authority for admission of the petitioning municipality. If the Board grants authority for admission, it shall also specify any terms and conditions, including financial obligations upon which admission is predicated. The petitioning municipality shall thereafter comply with the approval procedures specified in 24 V.S.A. § 4863. If a majority of the voters of the petitioning municipality present and voting at a meeting of the municipality duly warned for the purpose votes to approve this chapter and the terms and conditions for admission, the vote shall be certified by the clerk of that municipality to the Board of Supervisors. Thereafter, upon satisfactory performance of the terms and conditions for admission, the municipality shall by resolution of the Board of Supervisors become and thereafter be a member municipality of the District.
24 Appendix V.S.A. § 601-53