The State of Victoria passed regulations requiring licensed taxis to be fitted with an alarm system that played the message (and only played the message)
It would appear the wording of the particular message derived from Pacific.
Pacific sought licence fees in the Copyright Tribunal pursuant to the Crown Use provisions. That proceeding was adjourned pending resolution of court proceedings to determine if copyright subsisted in the text of the message.
Emmett J held it did not:
17. Copyright is concerned with the protection of the expression of ideas and not with the protection of ideas as such. Literary work comprises more than mere ideas. Many things that have no pretensions to literary style can be the subject of copyright. A literary work may be expressed in print or writing, irrespective of the question whether the quality or style is high (See University of London Press Limited v University Tutorial Press Limited  2 Ch 601 at 608). However, there must be some work involved in its production of a literary work, in the sense that it is necessary for the author to add something of substance in the form of the expression of ideas. Whether or not what the author adds is sufficient may be a question of degree in any given case.
18. The originality that is required concerns the expression of the idea or thought and not the inventiveness of the idea (see University of London Press Case at 608). Whilst the required skill or labour necessary for the creation of a literary work in which copyright may subsist is not large, it must not be insubstantial. For example, as a rule, a title does not involve literary composition and is not sufficiently substantial to justify claims of copyright protection. However, that does not mean that in a particular case the title may not be so extensive and of such a significant character as to attract the protection of copyright ….
After setting out a list of titles/slogans in which copyright had been denied, his Honour ruled:
21. The question presently in issue may be stated as whether a piece of writing or collection of words is to be accorded the status of literary work, having regard to the kind of skill and labour expended and the nature of copyright protection and its underlying policy. It is not correct to say that the purpose of the Copyright Act is to protect original skill and labour (see Navitaire Inc v Easyjet Airline Company Limited  RPC 111 at 148-149).
22. The Help Words are not a form of literary expression, but a setting down of several simple words in the nature of saying something in ordinary parlance. They are no more than a simple instruction. The Help Words do no more than state the obvious words for use in drawing attention to a taxi driver requiring urgent assistance. They are not words that should be afforded monopoly protection.
23. The Help Words simply indicate a desire to convey the notion that a taxi driver in duress seeks urgent assistance. They do no more than state an idea. The expression is inseparable from the fundamental idea that is being conveyed by the words. When the expression of an idea is inseparable from its function it forms part of the idea and is not entitled to the protection of copyright (see Autodesk Inc v Dyason  HCA 2; (1992) 22 IPR 163 at 172).
His Honour also noted it would be inappropriate for copyright to subsist in such a message lest a taxi driver in trouble or a passerby be found to infringe.
The decision, with respect, is entirely consistent with the approach for infringement recently declared by the High Court in IceTV but, perhaps because the State’s submissions the decision is made one were prepared and filed in October last year, there is no reference to that case.
State of Victoria v Pacific Technologies (Australia) Pty Ltd (ACN 065 199 439) (No 2)  FCA 737