^More than likely it depends on WHEN it was built or renovated or last permitted.
If it's in an air traffic hazard zone and needs a permit, a beacon likely gets required. If it's been there for 80 years and hasn't changed, it maybe doesn't have one.
Private property rights sort of guarantee that local jurisdictions can't force a standard on something that is existing until such time as it needs a permit to be altered.
Hope that helps?
Even if you are 1 in a million, there are still 7,000 people just like you...