I'm hanging my hat on the "person holding a valid license issued by the Federal Communications Commission in the amateur radio service;" section for the scanner in my vehicle. If my reading is correct, that would allow me to monitor all channels including police and fire. I keep a copy of this statute close to my Ham license.
I wouldn't think it matters whether this is a scanner or receive only portable.
Also, making an assumption from your avatar that you are a firefighter, there is another provision that may apply:
"(5) The provisions of this section shall not apply to a paid or volunteer member of a fire department or a paid or volunteer member of a public ambulance service licensed in Kentucky who has been given permission in writing by the chief of the fire department and the chief of each law enforcement agency whose frequency is to be monitored, or the director of the ambulance service and the chief of each law enforcement agency whose frequency is to be monitored, to possess a radio capable of receiving on a frequency allocated to a police department or law enforcement agency, whether the radio is in a vehicle or not."
So if you can get Sean or Jeff to write a letter giving you permission to have a radio to monitor fire channels, then you are okay there. (I wrote a few myself "back in the day".) If you want to monitor police channels, you'll need the police chief's written permission (I wouldn't hold my breath there though).