/etc/regdomain.xml
XML database of 802.11 regulatory constraints
802.11 wireless regulatory definitions
The regdomain.xml file describes regulations for the operation of IEEE 802.11 wireless radios.
This information is used by the ifconfig(8) program to construct regulatory state for download to the system. This file should be changed only to reflect changes in regulations.
/etc/regdomain.xml
XML database of 802.11 regulatory constraints
39 releases since FreeBSD 8.0-RELEASE; the text changed 25 times.