# The Planning (Control of Advertisements) Regulations (Northern Ireland) 2015, Paragraph 3

Extent: N.I.

In relation to advertisements within Class 4(1) or 4(2) “halo illumination” means illumination from within built-up boxes comprising characters or symbols where the only source of light is directed through the back of the box onto an otherwise unilluminated backing panel.

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Source: https://www.legislation.gov.uk/nisr/2015/66/schedule/3/paragraph/3 (the official version)
Page: https://openlegislation.uk/planning-control-of-advertisements-regulations-northern-ireland-2015/schedule-3/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.