Trust me, that's what the wording means. If you show up with a water pump not utilizing the stock mounting locations in some form, you will get tossed. The vague wording gives them the leeway to bounce you if they don't like the intention of the application.

The best way to really get an answer is to call your Divisional office and ask the Tech Director.
If you're in Oregon you could just call D6, or I would call D1, they are the Stock/SS directors.