The proper procedure to implement rental restrictions is to amend your declaration, which will include notice to, and voting among, the unit owners.

Chad,As you know I just know FL procedures.....It makes sense.

I have a decent credit score (>750) but my brother has a much lower score (low 600's) due to some medical debt he incurred many years ago.

Unfortunately, it sounds like the seller of your property gave them much more leeway than most landlords, but now that you are the owner the best strategy is to follow any remaining terms of your lease and follow the legal procedures specified by your state.In the long run, this will seem like a little blip. 

Is it education or medical debts? 

I guess I’m kind of a late bloomer, pursued a medical career out of college and that has dominated the last decade of my life.

If they don't want to go through the procedures to apply that I have made then they won't abide by the procedures and rules I have in the Lease agreement.

I just wasn't sure if there was more to it, or other procedures that were different from the buying strategy. 

So, do what you have to do- Don't even let them know you are upset and start on the eviction procedure.

I am a honest man and want to be sure I follow the proper procedures.