On an regular ASTRO system you can set up the HT's to not affiliate, and not TX... On a ASTRO-25 system I am sorry but to even monitor the radios must affiliate with the system. This has been discused time and again. If you have athorization to use a radio on a system then your fine and dandy as this has NEVER been debated.. But to use an unathorized radio to monitor the system is illegal. Scanners are not using a system, they only monitor it, and have NO access to the security, or safety, or advanced features, or any other true access.
I am not against you using anything you want if your athorized to monitor, or use the system. But if you are illegally accessing the system vias an unathorized radio no matter if its Motorola, E.F.J. or M/A-Com.... then thats another issue altogether....
And I don't know of any agency that will just give anyone access to thier full system on an EDACS Provoice system. Sure they might hook you up for Press Purposes with a radio with *SOME* TG's you can hear.. but I do not think youll be allowed full access to the system.
And this is one of the reasons that the State of Florida not only has full time digital, but also full time encryption, and has full time ESK engaged on thier EDACS Provoice. To keep ANYONE not athorized by the State to hear anything OFF. This is also the very reason that the a county I know of went with the VSELP format of ASTRO from Motorola... because you had to have a VSELP programmed radio to hear it much less access it.... The Sheriff of that County specifically stated on all the Press Accesses that they specifically want to be sure NO ONE can monitor them again.....
Luckily time has made sure that very soon they must switch to the newest ASTRO format, which is monitorable.. though SO will most likely now go to full time encryption.