Implementation of Sections 309(j) and 337 of the Communications Act of 1934 as Amended and Promotion of Spectrum Efficient Technologies on Certain Part 90 Frequencies

In this document the Federal Communications Commission (FCC) amends its rules to include a long-term schedule for the migration of Private Land Mobile Radio (PLMR) systems, using frequencies in the 150- 174 MHz and 421-512 MHz bands, to narrowband technology. Review of the FCC's equipment certification rules and the record revealed a slower pace to narrowband technology than is desired. Therefore, the FCC amended its rules to encourage spectral efficiency in the shared PLMR bands and to facilitate timely transition to narrowband technology in the shared PLMR bands. These amendments to the FCC's rules are intended to produce more efficient use of PLMR spectrum in the 150-174 MHz and 421-512 MHz bands.