(1) Subject to the provisions of this Constitution, each House of the National Assembly shall have power by resolution published in its journal or in the Official Gazette of the Government of the Federation to direct or cause to be directed investigation into -
(a) any matter or thing with respect to which it has power to make laws, and
(b) the conduct of affairs of any person, authority, ministry or government department charged, or intended to be charged, with the duty of or responsibility for -
(i) executing or administering laws enacted by National Assembly, and
(ii) disbursing or administering moneys appropriated or to be appropriated by the National Assembly.
(2) The powers conferred on the National Assembly under the provisions of this section are exercisable only for the purpose of enabling it to –
(a) make laws with respect to any matter within its legislative competence and correct any defects in existing laws; and
(b) expose corruption, inefficiency or waste in the execution or administration of laws within its legislative competence and in the disbursement or administration of funds appropriated by it.
Section 88 of the Constitution of the Federal Republic of Nigeria