Can a renter be allowed to serve on condo board?

I live in a condo association whose docs say that a renter can be on the board. This is in Florida.

Unfortunately, a renter has been attending our board meetings and sending notes to unit owners when she wants to comment, causing distress and hard feelings with the other unit owners.

I really have two questions;

1. Can a non unit owner attend board meetings?

2. Have you ever heard of a renter serving on a board?