Previously, this was done when the minister changed portfolios. However, in theory, if this rule had not been put in place last August, a new security check for all ministers having changed portfolios during the last Cabinet shuffle would have been done in August. That was not done given that, according to the rule, the timeframe is two years and the previous check dated back to 2006. The next check was therefore going to be done in 2008. That is how I see it.
On June 17th, 2008. See this statement in context.