FCC Mainpage: http://www.fcc.gov/
The Code of Federal Regulations, Title 47
CFR 47: https://www.ecfr.gov/cgi-bin/text-idx?tpl=/ecfrbrowse/Title47/47tab_02.tpl
CFR 47, Part 74 (in entirety): https://www.ecfr.gov/cgi-bin/text-idx?SID=cafe75e8176edbdac9a19fd3dde4f695&mc=true&tpl=/ecfrbrowse/Title47/47cfr74_main_02.tpl
CFR 47, Part 74, Subpart H (specific rules on operators and frequencies allotted: https://www.ecfr.gov/cgi-bin/text-idx?SID=cafe75e8176edbdac9a19fd3dde4f695&mc=true&node=sp47.4.74.h&rgn=div6
CFR 47, Part 74, Subpart I (frequencies available for assignment to Land Mobile/Public Safety, etc.
https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-90/subpart-L/section-90.303
Additional FCC Links
FCC Post Incentive Guide: https://www.fcc.gov/about-fcc/fcc-initiatives/broadcast-incentive-auction/wireless-microphones-and-post-incentive
FCC Universal Licensing System: http://wireless.fcc.gov/uls/index.htm?job=home
FCC Guidelines for Wireless Microphone and Low Power Auxiliary Use (as of 10/2019): https://www.fcc.gov/consumers/guides/operation-wireless-microphones
FCC Operation of Wireless Microphones: http://transition.fcc.gov/cgb/wirelessmicrophones/manufacturers.html
FCC Notes on Wireless Microphones: https://www.fcc.gov/wireless/bureau-divisions/mobility-division/wireless-microphones
FCC DTV Coverage Area Maps: http://www.fcc.gov/mb/engineering/maps/
FCC License Search: http://wireless2.fcc.gov/UlsApp/UlsSearch/searchLicense.jsp
Additional Links:
DTV Search by Zip-code: https://www.rabbitears.info/searchmap.ph
TV & Radio Channels Around the World: http://www.tvradioworld.com/
Current and Future US DTV Channel Assignments: https://www.lectrosonics.com/images/PDFs/POST_AUCTION_CITIES-Detail.pdf