# The Use of Invalid Carriages on Highways Regulations 1988, Regulation 12: Audible Warning Instrument

Extent: E+W+S

(1) A Class 3 invalid carriage shall be fitted with a horn, not being a reversing alarm or a two-tone horn.
(2) The sound emitted by any horn fitted to an invalid carriage shall be continuous and uniform and not strident.

---
Source: https://www.legislation.gov.uk/uksi/1988/2268/regulation/12 (the official version)
Page: https://openlegislation.uk/use-of-invalid-carriages-on-highways-regulations-1988/regulation-12
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.