If you are talking about Portland Police, their codes are sort of a mish mash of various standards, They use some of those ten codes listed, along with some CRISS codes and some OSP 12 codes. I was sort of confused at first listening when I moved to Portland, but soon picked up what was going on since I was already fluent in radio protocol from a stint as a Reserve Police Officer in California. If you listen long enough, you can sort of figure out what the are talking about.