 But the FCC added that amateurs wishing to experiment with 136 kHz communications may apply for a Part 5 Experimental License  or operate under Part 15 regulations for this part of the electromagnetic spectrum.In the case of Part 15, the field strength measured 300 meters from the antenna may not exceed 2,400 microVolts per meter divided by the frequency in kilohertz, or approximately 17 μV/m.On 19 November 2012, the FCC issued a Notice of Proposed Rulemaking  demonstrating intent to authorize the amateur service as a secondary user of the LF band between 135.7–137.8 kHz with a maximum EIRP of 1 watt.