||<p>Local authorities already have powers under the Transport Act 2000 to implement
Clean Air Zones. The Clean Air Zone (CAZ) Framework sets out the principles for the
operation of Clean Air Zones in England. It provides the expected approach to be taken
by local authorities when implementing and operating a Clean Air Zone. The full guide
provided to local authorities is in the link below.</p><p><a href="https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/612592/clean-air-zone-framework.pdf"