>>>That is exactly the reason that the time limit was struck in 2008, conflict with other federal law.<<<

So, you are saying that OPA cannot regulate when signs go up or when they must come down. That would be a contradiction of the Maryland HOA Act and the opinion of OPA attorney Joe Moore.

The First Amendment prevents federal, state, and local governments from stifling one's freedom of speech. However, an HOA is not a government entity. Thus, I believe OPA as an HOA is bound by the Maryland HOA Act that prevents HOAs from precluding political signs but allows an HOA to set time frames for political signs but not less than 30 days prior to an election and not less than 7 days after an election  

Your introduction of county sign code just muddies the water unnecessarily, but I would not be upset if you prove me wrong.