 In 1989, Armiger was called as an expert witness along with Derek Williams and Dr G.B.Hair in the Federal Court of Australia in a copyright infringement case brought by Guy Gross against CBS Records Australia Limited and Collette Roberts, with the court finding in the defendants' favour.Again, in October 2009 Armiger was called as an expert witness for a Federal Court hearing on a plagiarism claim against Colin Hay and Ron Strykert as writers of the 1981 Men at Work hit single "Down Under", which peaked at No.