A method and network node for controlling operation of first and second wireless communication networks both operating in a predetermined frequency band. After digitally printing a substrate, it is processed through a series of scoring wheels, male on top, female wheel on bottom. One or more computer processors determine a policy action based, at least in part, on a result of a comparison between an attribute of the first certificate and an attribute of the second certificate. A lower pilot rib configuration is also included to allow insertion of the one-piece metallic threaded insert with either the upper or lower end entering the carrier substrate first. In a specific example, Tropnin I reacted with sodium tetrafhionate yielded sulfitolyzed Tropnin I, which was purified by chromatography on an anion exchanger, followed by hydrophobic interaction chromatography.