I think it’s a bit risky making training an entry requirement – it could lead to monopolisation of the committee by people who have done a course but have barrows to push or personalities not suited to working collaboratively in a team. But I think it should be encouraged, especially for committee members going on for a second year or more. And the training cost should be covered.
The next step to consider would be an annual allowance once the training is under the belt. That said, I don’t know what training would be available here in Tasmania.