Senate Bill No. 1457 establishes an airport development zone in the town of Plainville, which will consist of nine specific census blocks as determined by the 2020 federal decennial census. This bill modifies existing law by repealing the previous provision that established a single airport development zone and replacing it with a new provision that creates two zones: one in Windsor Locks and surrounding towns, and the new zone in Plainville. The bill allows taxpayers within the designated area to qualify for partial property tax exemptions for improvements or acquisitions related to manufacturing facilities, machinery, and equipment.

The effective date for this bill is set for October 1, 2025. The establishment of the airport development zone may lead to a reduction in Plainville's grand list due to the property tax exemptions, which could result in revenue loss for the municipality. However, this loss may be partially offset by the Distressed Municipalities grant program, which reimburses municipalities for a portion of the tax loss. The bill also allows for the approval of billboards and advertising signs within the zone, subject to regulations and local ordinances.