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The FCC Wireless Bureau said it reached the final phase of its pr...

The FCC Wireless Bureau said it reached the final phase of its private land mobile radio (PLMR) spectrum audit. Call signs for which licensees have failed to respond will be viewed as having been cancelled automatically when the audit…

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closes, the Bureau said. It has been auditing the construction and operating status of certain PLMR stations, including those licensed below 512 MHz that are subject to frequency coordination and construction and operational requirements under FCC rules. The FCC’s Part 90 rules for PLMR operators require construction within a certain period and that stations remain operational for the license to remain valid. If construction hasn’t been completed in the required time, or a station hasn’t operated for a year, the license cancels automatically. The Bureau sent 267,000 letters involving 420,000 call signs from Aug. 2001 to Jan. 2002 had a 73% response rate. A 2nd mailing in 2002 generated an 88% response rate. The Bureau said there now were 14,000 call signs for which it hadn’t received a response. In a public notice this week, it described its plans for call signs with outstanding audit responses when PLMR letters were returned to the FCC as undeliverable. In the final phase of the audit, the agency said undeliverable call signs that remained without a response for 30 days after the agency published its list in the Federal Register would be deemed to have cancelled automatically. The FCC said 2,300 call signs were covered in letters returned to the Commission as undeliverable.