There's a hiring process certainly in all the ministers' offices. The hiring process is not necessarily the same within all ministers' offices, in terms of how many people won interviews, but there's an interview process.
When somebody is made an offer of a position, that person is subject to the rules that are in place with respect to the Privy Council Office. They're subject to quite extensive security clearances in order to achieve whatever level of security clearance they're deemed appropriate to have. They're obliged through that process to follow all of the measures that are in place around confidences in terms of documents, memorandums to cabinet, development of policy papers, and the like. There's a substantive security clearance that ministers' office staff or exempt staff have to go through.