1773.11  UNLAWFUL ACTS BY ARCHITECTS, BUILDERS, ETC.
   No architect, builder, contractor, corporation, firm, or individual shall knowingly aid or abet any warm air heating contractor to do any work in violation of the provisions of this article or to connive at its violation, or knowingly employ unlicensed warm air heating contractors for the performance of such work.
(1978 Code Sec. 5-65)