“determine, direct, or decide important matters” is what makes this specific. This is no different than the traditional definition of “controlling interest”. The meaning of “controlling” in this context has a long legal precedent that is not overridden by this bill.

Edit: as a concrete example, I do not have a majority share in the company I work for but legally I have a “controlling interest” because I am an executive as well as owning shares. I know this because that is how I am required to fill out financial declarations.