Hi - my name is XXXXX XXXXX I'm a Real Estate litigation attorney. Thanks for your question. I'll be glad to assist.
The portion you've quoted: "or an officer, director, partner, employee, or agent of a corporation, partnership, trust or other legal entity which, either alone or in combination with or as a partner of one of more other persons, is a Unit Owner." is a VERY CONFUSING PHRASE.
The first reason it is confusing is because it appears to be making the point that someone associated with a legal entity (corp., LLC, S-Corp, Inc., etc.) could be considered a unit owner.
Then at the very end, it throws out the language that says "as partner of one or more other persons". The confusing thing about this is whether or not "partner" means a business partner or whether it means a spouse or significant other.
It appears that "partner" would mean a business partner, not a significant other/spouse because the entire section is discussing legal entities and the rights of agents, employees, members, etc. Thus, it's likely that this provision doesn't address a partner-spouse.
Thus, the first thing would be to get the board's interpretation of this provision, and if they claim it says that a member's spouse can be a board member, the only thing you could do to legally challenge the decision would be to file suit against the association and this board member for breaching the contract (bylaws) and ask a court to find that she's not eligible to be an officer due to the bylaws.
If the board will not act on this, then the only way to make the board follow the rule/have the rule interpreted is by going to court and asking a judge to do it and enter an order.