Project 25 Compliance Assessment Bulletin: Supplier's Declaration of Compliance and Summary Test Report Requirements for Subscriber Units [August 2018] [open pdf - 2MB]
From the Introduction: "The Department of Homeland Security (DHS) Office for Interoperability and Compatibility (OIC) Project 25 Compliance Assessment Program (P25 CAP) is a voluntary program that allows P25 equipment suppliers to formally demonstrate their products' compliance with a select group of requirements within the suite of P25 standards. The purpose of the program is to provide emergency response agencies with evidence that the communications equipment they are purchasing meet P25 standards for performance, conformance and interoperability. The program requires test laboratories to demonstrate their competence through a rigorous and objective assessment process. Such a process promotes the user community's confidence in, and acceptance of, test results from DHS-recognized laboratories. [...] This documentation will serve to increase the public's confidence in the performance, conformance and interoperability of P25 equipment."
Department of Homeland Security: https://www.dhs.gov/