The political subdivisions of this State have full authority, under their respective zoning powers: To zone areas for commercial or industrial purposes; and In these areas, to govern the size, spacing, and lighting of outdoor signs. Notwithstanding any provision of this part or any rule or regulation of the Administration: Local zoning regulations that relate to outdoor signs in commercial or industrial areas shall govern within the zoned area; and If a political subdivision adopts comprehensive zoning that includes the regulation of outdoor signs: The Administration may so certify to the Federal Highway Administrator; and On certification, the control of outdoor signs in commercial or industrial areas transfers to the political subdivision.