Except as otherwise provided in this Code, no sign or any portion thereof shall be permitted which moves or assumes any motion constituting a non-stationary or non-fixed condition except for the rotation of barber poles, permissible changing signs or permissible multi-prism units. Indexing multi-prism units must not exceed a speed of two complete revolutions every twenty seconds. This section is not meant to prohibit any form of vehicular signage such as a sign attached to a bus or lettered on a motor vehicle.
(1952 Code § 43-8-3)