As of May 3rd, 2021 the FCC has imposed a new antenna power density record keeping rule for all ham stations. Ham stations must be able to prove that their RF emissions are safe, and keep a record of those evaluations.
Previously, ham stations enjoyed a categorical exemption. Now every radio amateur will have to perform an RF exposure evaluation of their stations. This now includes mobile and portable stations, including HTs, SOTA/POTA stations, and Field Day and special event stations.
This recorded presentation put together by Dan, W1DAN, ARRL Eastern Massachusetts Section Technical Coordinator, explains the changed rules and what they mean for amateur radio operators going forward.
For a great FAQ on the subject, also see the ARRL’s RFX FAQ (posted here)
Visit the RF Exposure Calculator for a quick easy way to calculate whether your station complies with the safe RF Exposure limits.
You should print out the finished calculations and save it in your station records in case any FCC staff ask to see them.
If you make any changes to your station, such as relocating your antenna, installing a new antenna, or radio or changing wattage, you should redo your evaluation and save a record of the updated evaluation in your stations logs.