Vacancy or participation of strangers not to invalidate proceedings
Section 61 · 1999 Constitution (2004 edition)
What Constitution says
The Senate or the House of Representatives may act notwithstanding any vacancy in its membership, and the presence or participation of any person not entitled to be present at or to participate in the proceedings of the House shall not invalidate those proceedings.
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 46. Original document
Release: draft-c8d50d87fae9. Source scope, review and corrections