In the U.S, this service may operate in the paired 152/158 and 454/459MHz bands and on 10 channel blocks in the 816-820/861-865MHz bands. BETRS may be licensed only to state-certified carriers in the area where the service is provided and is considered a part of the public switched telephone network (PSTN) by state regulators.
Regulation of this service currently resides in parts 1 and 22 of the Code of Federal Regulations (CFR), Subtitle 47 on Telecommunications, and may be researched or ordered through the Government Printing Office (GPO).
Source: Federal Communications Commission (Wireless Bureau)