Regarding your post below allow me to address Cordwell's use of his vehicle with a different approach.  To me it appears the rule, as written,  allows for an interpretation.  I suggest we pay attention to "display" appearing in the following sentence from the subject rule:

ARC Section 600.3 (J) (2)

"....No political signs, displays, or literature may be placed on or in any property....... owned by or under control of the Association."

From my perspective I interpret  that he is using his vehicle as a DISPLAY.  Then the violation is occurring not with improper signs but with placing a display on a property owned by the Association.

P.S. I am copying other forum members hoping those knowledgeable with the "legal world"  will offer their views and clarity.  Is my attention the word "display" key to sorting out this debate?

Thanks in advance,

Slobodan