Maine

Maine ALPR law

29-A MRSA § 2117-A

Prohibits the use of ALPR systems except by identified state and local governmental entities for certain public safety purposes, including protecting public safety and transportation infrastructure, commercial motor vehicle screening and inspection, and conducting criminal investigations and ensuring compliance with local, state and federal law. Authorized users may only use an ALPR system for official and legitimate purposes of the user’s employer. Provides that data collected is confidential and may be used only for law enforcement purposes. Authorizes, but does not require release of aggregate data and summary reporting. Data not considered intelligence or investigative record information, or data collected for commercial motor vehicle screening, cannot be stored for more than 21 days. Violation of this section is a class E crime.

Summary quoted from NCSL, Automated License Plate Readers: State Statutes, updated September 28, 2026. Not legal advice; read the statute.