You know things are getting serious when you measure your antenna in kilometers…
The FCC has published FCC-17-33A1 that adopts rules to implement certain radio frequency allocation decisions from the World Radiocommunication Conference 2012 and 2007, including adding two new bands to the Amateur Radio Service. It allocates 135.7-137.8 kHz and 472-479 kHz to the amateur service on a secondary basis for General, advanced, and Extra class licensees.
TL;DR: from the Order:
EIRP is limited to five watts on 630 meters, except for that portion of Alaska that is within 800 kilometers of the Russian Federation’s borders, where the maximum EIRP is limited to one watt. Maximum antenna height is 60 meters.
EIRP on 2200 meters is one watt.
The amateur service will share this band with power line communication (PLC) signals (among other users) which electric utility companies use under Part 15 (unprotected and noninterference basis). The Utilities Telecom Council (UTC) objected to the proposal, citing interference potential.
The FCC sided with the Amateur Radio Research and Development Corporation that a secondary amateur service allocation to the bands will provide new opportunities for amateur operators to experiment with equipment, techniques, antennas, and propagation.
“Amateurs wishing to operate on the band will need to notify the Utilities Technology Council (UTC) and be separated at least 1km from electric transmission lines that carry power line communication (PLC) signals that use the same band.” — Wikipedia
— h/t to the East Pennsylvania ARRL