Just as the title suggests and we radio amateurs knew all along.
I captured this information at the below linked site. It is interesting that once again, it's proven that politics can over shadow sound technology and physical laws. For shame on the part of the FCC (Federal Communications Commission) to allow for this to happen internally.
Please take a moment to read this referenced article on dslreports.com
New Docs Show FCC Glossed Over BPL Flaws