Here’s a clean, professional text for an “Academy Special Police Unit” sign (with “SIGNIT” as a unit identifier or motto):

Elite Training. Precision Duty. Unwavering Integrity.

Authorized Personnel Only If “SIGNIT” is meant to be a play on “sign it” or “signature,” or a specific acronym (e.g., Special Investigations Group for Night Interdiction Tactics), let me know and I can adjust the wording accordingly.