Can my condo board fine me for not cleaning?

Q. Our condo building does not have a cleaning service in place. The board has mandated that each owner take 2-week turns  cleaning the common hallways or face an $80 fine.

Are condo board members at large considered directors?

Q. One of our unit owners asked to join our condo board as a member at large and we agreed. Are members at large considered directors and do they have a vote?

How long can an owner serve on the condo board?

Q. The same three people have been board members for our condominium association for years.