It's always been policy, per the handbook, section 6.3.2. The system is in staging. I imagine since the system is so elusive and such little data has surfaced, it went into staging until information can be verified and populated. Systems in staging can only be viewed by admins, it's nothing negative, just helps with the house-keeping of new systems.
Notice that there's hardly any info. Why? Because a few overzealous listeners were mistaking NJ's new 700 MHz P25 system for what they thought was a new NYPD system. So to avoid any further confusion, the NYPD system was "hidden".