There are really two primary sources for the mandatory training in terms of ministerial delegated authority for the Minister of Transport.
We have policy documents that specify exactly what training the inspectors need to do their work, so that's a requirement for the delegation. In some cases, training may be specified in the contract of employment. Again it's mandatory, but from a different source.
Within civil aviation we have directives in terms of the surveillance training, for example, the inspectors need to have. There's also an ongoing need, not necessarily mandatory, to make sure people continue to be technically competent in their technical field as well as in their inspection field.