Charles,
Here is what we use in the Mid-South region in our SUPPS:
2. Participants shall not use radio frequencies 151.600 MHz, 151.625 MHz, 151.655 MHz, 151.955 MHz and 154.700 MHz.
I don't know if the other regions are using the same. I hope that this might help. Hopefully we will be able to use this for a race this year.