Yes, on ALL P25 systems, Any P25 radio that is powered on, and gets within "capture" range of an site on the system will automatically attempt to affiliate with that site. If it is an RID that the system recognizes, then affiliation is allowed. This is what makes scanning an Wide Area P25 so cool, since any TG that is programmed into any radio affiliated with any site your monitoring can be heard if it is used. (That is, unless the radio is specifically set up to only affiliate with specific sites on the system, which is sometimes done, but not as often as it used to be to allow for roaming and full interoperability systemwide.) So you may see lets say CPD which has not officially come on yet, with lets say, 3 LEA, and the Mutual Aid TG's programmed in affiliate with a site. Lets say the 3 local area LEA TG's are CPD Dispatch, ACSO Dispatch, and an Countywide LEA Interop... These three are now affiliated with that site, and if used can be heard. Even if not used, Pro96Com, UT, T-88 will show at least the main TG that radio is set to, as well as the RID when it affiliates.