That's not true, they are allowed to conduct political activities, so long as they meet the conditions imposed by the legislation. It would be impossible to have no political activity unless the charity has no stance whatsoever on the laws of the land. The Frasier Institute opposes gun laws. That's political. The Suzuki Foundation opposes aquaculture development in open waters. That's political. The Heart and Stroke Foundation lobbies for government action on trans fats. That's political.
I doubt you could find a charity that has no political activities.
My mistake, my intent was based on this condition:
"non-partisan (never oppose or support any political party or candidate in any way);"
You'll notice that those orgs that are being audited, most notably Suzuki, have contravened the above element