The procedures for withdrawal of a municipality from a Regional School Unit (RSU) or School Administrative District (SAD) are in accordance with Title 20-A MRS §1466: Withdrawal of a single municipality from a regional school unit.
New School Administrative Unit To Do List (after withdrawal process is complete)
In order for a town to withdraw from a Regional School Unit, the final referendum vote by the town to approve the withdrawal agreement must have been completed by November 30 of the prior year in which the town hopes to withdraw effective July 1 (per Title 20-A MRS §15689-B, subsection 7).
For example, if a final referendum vote to approve the withdrawal agreement is held by November 30, 2019, the effective date of withdrawal can be July 1, 2020 (FY 21). However, if a final referendum vote to approve the withdrawal agreement is held after November 30, 2019, the effective date of withdrawal cannot be until July 1, 2021 (FY 22).
Timeline Tool - To Determine Deadlines for Withdrawal Requirements