Is exposure to RF energy regulated?

Yes.  The U.S. Congress required (1996 Telecom Act) the Federal Communications Commission (FCC) to adopt a nationwide human exposure standard to ensure that its licensees do not, cumulatively, have a significant impact on the environment.  The FCC adopted the limits from Report No. 86, “Biological Effects and Exposure Criteria for Radiofrequency Electromagnetic Fields,” published in 1986 by the Congressionally chartered National Council on Radiation Protection and Measurements (NCRP). Separate limits apply for occupational and public exposure conditions, with the latter limits generally five times more restrictive.  The more recent standard, developed by the Institute of Electrical and Electronics Engineers and approved as American National Standard ANSI/IEEE C95.1-2006, “Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz,” includes similar limits. These limits apply for continuous exposures from all sources and are intended to provide a prudent margin of safety for all persons, regardless of age, gender, size, or health.