Vt. Stat. tit. 24A § 3-165
In case of a vacancy in the office of school commissioner, occasioned by death, resignation, removal from the ward, or as a result of such school commissioner no longer residing in such ward as a result of reapportionment or other causes, the same shall be filled by a new election in the proper ward; and in case there shall arise an occasion for any such new election, for any of the above mentioned causes, the same shall be held within 90 days of the date of such vacancy, provided such vacancy shall occur before the first day in October in any year; otherwise it shall be filled at the next annual City election. In the case of reapportionment, such election shall be held at the next ensuing annual City meeting and the term of the school commissioner who no longer resides in the ward as a result of reapportionment shall continue until the newly elected school commissioner assumes office on the first Monday in April.
24 Appendix V.S.A. § 3-165