That means no pennants baring sports team logos, no Jolly Rogers, no rainbow banners celebrating gay pride and no historic flags showing a coiled rattlesnake bearing its fangs.
Indeed, I’m sure that were rattlesnakes capable of written language, they’d have written themselves a constitution granting the right to bear fangs, especially since fangs are an inherent trait of their species and all, but I do believe the copyeditor over at the old Grey Lady somehow managed to interchange “baring” (uncovering or showing, often in a display of aggression) and “bearing” (bringing or carrying) in this sentence.
(The article has since been fixed.)