I'm not sure I fully understand the question. Every former designated public office holder is subject to the five-year prohibition, unless, of course, they work for a corporation and the activities of lobbying would be less than 20%. There is a small exemption there, and I find that there is no explanation for that exemption. It should be the same whether or not you work for an organization or a corporation. Currently, everyone who's a former designated public office holder is subject to the five-year prohibition.
On November 27th, 2020. See this statement in context.