An improved method, system, and computer program product for efficient transmission of data to multiple network nodes is disclosed. The methods generally include receiving or transmitting radio signals encoded with spectral allocation information, analyzing the spectral allocation information to determine available bands in the regulated spectrum for signal transmission, and transmitting signals on at least one of the available bands in the regulated spectrum. If the points do not match, the signature is not authentic. The split drive ring includes a driven mechanism driven by the drive mechanism.