Thank you, Madam Chair.
The term “ex officio” might not achieve the purpose that's being proposed by the member. Ex officio refers to a situation whereby a person, by virtue of their function or their position in one instance, also acquires a function or a position in a different one.
For instance, the Minister of Justice is, ex officio, the Attorney General of Canada, as well as an ex officio member of the Law Society of Upper Canada. It doesn't have the exact same connotation.