(A)   No person shall engage in, aid or abet any motor vehicle speed contest or exhibition of speed on any street or highway.
   (B)   No person shall for the purpose of facilitating or aiding or as an incident to any motor vehicle speed contest upon any street or highway, in any manner obstruct or place any barricade or obstruction upon any street or highway.
   (C)   When three or more persons assemble to witness or participate in an unlawful speed contest such assembly is unlawful assembly and any person who participates in such unlawful assembly is guilty of an offense.
(`83 Code, § 15-533)  Penalty, see § 71.999