I’m not a lawyer but it would appear from Subsection 6 that it would have to be votes of those present at the meeting in person or by virtue of a telephone or internet connection.
The only variation on this that I can think is if the absent owners had nominated others to be their representatives on the committee but that would have to be voted on and accepted by the committee before their votes were counted so, on the face of it, unless one of the absent members was on the other end of the phone, the nominations don’t count as a vote.
You might need a professional’s advice on this but I would think, on the face of it, that the votes were invalid and are certainly worth challenging (bearing in mind that the committee majority would only need to line up their absentee votes to re-elect the wrongly elected members).