The norm had been, before that, to do checks when ministers changed offices or when cabinets were formed, which could mean that if a minister stayed in office for four years or five years there would not have been any check done. There had not been any particular problem. This was just a sense of regularizing it more systematically. But they would have normally been done, before that, at the time a minister changed office or when a cabinet was formed initially.
On June 17th, 2008. See this statement in context.