In my view their power under the section is further circumscribed and limited by sub-section (2) of section 82. They can only invite members of the public when they want to gather facts for the purpose of enabling them make law or amend existing laws in respect of any matter within their legislative competence or as witnesses in a properly constituted inquiry under section 82(1)(b). Their power to expose corruption, inefficiency, or waste is also limited to government departments, authorities, and functionaries.
– Oguntade, JCA. El-Rufai v. House of Representatives (2003)