I would classify that as an ad. What other purpose would it have? The banners I see hanging on buildings would not fit the "impractical" exception and it should be there. That exception is often used for many small items or odd shaped. If it is on your bank building, there is an exception for that.
_________________________
AndyZ CRCM
My opinions are not necessarily my employers.
R+R-R=R+R
Rules and Regs minus Relationships equals Resentment and Rebellion. John Maxwell