On a recent flight I noticed that MOAs (Military Operations Area) are either yellow or red. Looking through the manual, I can't find anything explaining the color coding. In fact, the words "prohibited", "restricted", and "MOA" do not come up in a search of the manual at all...
What do the color codes mean and where does the information come from to set the color coding?
In some cases MOAs were red that ATC advised were cold.
Thanks,