Disqualifications (National Assembly)
Section 66(1)(b) · 1999 Constitution (2004 edition)
What Constitution says
(b) under any law in force in any part of Nigeria, he is adjudged to be a lunatic or otherwise declared to be of unsound mind;
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 47–48. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections