Say bye bye to listening there then
If it's this your referring too...
"...Inter-networking to provide Miami-Dade users with advanced features such as emergency services, unit-to-unit calls, caller ID,
end-to-end encryption and inter-system roaming across existing, emerging and future airlinks."
No large vendor system press release would be complete nowadays without a reference to encryption or over the air security in some way.
Whether that statement actually translates to full time encryption being used when the system is live is another matter.