Crimes Act 1900

If, by this or any other Act, any offence, conduct, or language, in a public place, or open and public place, or place of public resort, is made punishable, or a person guilty thereof is made liable by apprehension, the place shall be deemed public for the purposes of the enactment or taken to be otherwise within its meaning if the same, although a vessel or vehicle only, or a room, or field, or place, ordinarily private, was at the time used for a public purpose, or as a place of common resort, or was open to the public on the payment of money or otherwise.