The last amendment to Rule Part 92 - Carriage of Dangerous Goods is dated 22 June 2006, and the accompanying Advisory Circular (AC 92-2) was last amended on 27 April 2007 so I'm unsure as to the root of the recent changes as suggested. That said each individual Air Operator Certificate (AOC) holder has the right to determine how he applies the rule to his operations and may of course make those changes at any time.