There is a tenant in our condominium occupying a commercial unit who is causing numerous nuisances. I want to amend the condominium rules to change the purpose of this unit to professional use. What majority is required to pass this resolution?

When it comes to modifying the use of private areas belonging to a co-owner or the terms of their enjoyment (for example, transforming a commercial space into a professional space), the law requires unanimity (Article 26 of the law of July 10, 1965).