NYC Federal Interop Tests

I've received some information about weekly testing of the New York City federal interop radio channels. Reports are that 167.7875 MHz, 407.7750 MHz and 414.7500 MHz are all used in these weekly check-ins with various local, state and federal agencies. The input to the 167.7875 MHz P-25 repeater is believed to be 164.7375 MHz and 407.7750 MHz is most likely the input to the 414.750 MHz repeater. The control operator appears to be the FBI New York Communications Center. I also heard a story that even though 414.7500 MHz is a nationwide US Postal Inspectors frequency, two Postal Inspector units who were trying to use this repeater in New York City were chased off the air by the FBI communications operator. I wonder if they leave these frequencies patched all the time, or someone forgot to drop the patch after the interop test?

For more information on the participating agencies and the radio systems involved:
http://www.ojp.usdoj.gov/nij/topics/commtech/25cities/newyork.pdf