With the UV-5R you can enter frequency limits with CHIRP so the user can't
enter anything outside those limits manually in VFO mode. You can still
program in frequencies outside those limits with CHIRP and upload them to
the radio.
This is very useful as you can set the radio up for a Ham that may also have need
to use the radio on other services for which they are authorized without worrying
he may inadvertently transmit or enter and transmit on a frequency he should not.
If I enter in frequency limits in the "settings" section in CHIRP for the UV-B5, however, it
then will not allow any frequencies outside those frequency limits to be programmed