Code 39 Environmental zone Not applicable Reserved

Contravention code 39: TfL Ultra Low Emission Zone reserved code

RESERVED FOR TfL USE (ULTRA LOW EMISSION ZONE)

Code facts

Jurisdiction
London
Location
Road user charging
Enforcement
Unknown
Last reviewed
2026-08-03

Reserved

This record is reserved in the supported schedule and should not be treated as a normal active allegation.

Plain-English explanation

Code 39 is reserved in the supported official schedule and should not be treated as a normal active allegation without checking the issuing authority and scheme.

This guide provides general information about civil traffic contraventions. It is not a substitute for advice based on the facts and documents in an individual case.

Suffix decoder

No suffix is listed for this base code in the supported source schedule. If your PCN shows an extra character, check the original notice and the issuing authority before relying on it.

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What the issuing authority is alleging

  • That the code is being used by an authority or scheme entitled to use it
  • That the notice explains the alleged contravention clearly enough for the recipient to respond

Evidence to review

  • All pages of the PCN and any later notice
  • Date, time, location and vehicle-registration details
  • Council photographs or video stills
  • Relevant signs, road markings and bay or zone layout
  • Scheme account, exemption or payment records
  • ANPR images where provided
  • Vehicle emission or registration records

Points requiring investigation

  • Check whether the PCN description matches the code and any suffix actually printed on the notice.
  • Review whether the signs, lines or scheme terms at the location support the alleged restriction.
  • Check whether the authority evidence covers the full period or manoeuvre that matters for this code.

Common misunderstandings

  • A suffix is contextual and does not always mean the same thing for every base code.
  • A short stop can still be alleged if the restriction prohibits stopping rather than parking.
  • A belief that the restriction was unfair is different from evidence that the alleged contravention did not occur.
  • Reserved codes should not be read as ordinary active contraventions unless an authority-specific scheme explains the use.

Related codes

Sources