New English language requirements for employer sponsored temporary business visa (the subclass 457) programme commence on 1 July
Source: Australia. Minister for Immigration and Citizenship. Media Release
"From 1 July 2007, overseas workers must have English language skills equivalent to an average band score of 4.5 in an International English Language Testing System (IELTS) test, unless exempted in certain special circumstances. Applicants must have higher English language skills where this is required for licensing, registration, or membership of a professional association in their nominated occupation. "