800 Independence Avenue SW., Washington, DC 20591 (f) Certification may be requested for equipment that has the capability to transmit in the 138-144 MHz, 148-149.9 MHz, or 150.5-150.8 MHz bands as well as frequency bands set forth in Section 87.173 of this part. The Commission will only certify this equipment for use in the bands regulated by this part. Section 87.151 is added to read as follows: § 87.151 Special requirements for differential GPS receivers. (a) The receiver shall achieve a message failure rate less than or equal to one failed message per 1000 full-length (222 bytes) application data messages, while operating over a range from -87 dBm to -1 dBm, provided that the variation in the average received signal power