Question about Pinellas MED Trunked & UHF freqs

[kny2xb]

What is the difference [if any] between the MED Control/ALS usage on the Pinellas County trunked system and the 463/468 MHz UHF MED frequencies?

It's probably something simple I didn't catch...

Thank You in advance

 

[puzzleriddle]

disregard