As in the RCMP's case, every department has an internal audit committee that develops a risk-based plan annually. By year's end, those committees are capable of reviewing practically all the activities in a department. Although the audits themselves are not conducted in all the branches, people know that auditors can come at any time, including those from the Office of the Auditor General of Canada.
On February 23rd, 2017. See this statement in context.