Power as to matters of evidence (House of Assembly)
Section 129(1)(d) · 1999 Constitution (2004 edition)
What Constitution says
(d) issue a warrant to compel the attendance of any person who, after having been summoned to attend, fails, refuses or neglects to do so and does not excuse such failure, refusal or neglect to the satisfaction of the House of Assembly or the committee, and order him to pay all costs which may have been occasioned in compelling his attendance or by reason of his failure, refusal or neglect to obey the summons and also to impose such fine as may be prescribed for any such failure, refusal or neglect; and any fine so imposed shall be recoverable in the same manner as a fine imposed by a court of law.
This is the 1999 Constitution as published in 2004. Later amendments aren't included yet, so a section may have changed since.
Original source
Official Gazette · CFRN 1999 official PDF · printed page 66. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections