This bill modifies the Byrne-JAG grant program, which provides federal funding to state and local law enforcement agencies, to explicitly allow police departments to use these grants to purchase armored vehicles, tactical vehicles, disaster response vehicles, and command and control vehicles. The legislation defines these vehicle types to include military-style vehicles like Humvees and heavy trucks that can operate in rough terrain, as well as armored vehicles that provide ballistic protection and mobile command centers equipped with communication systems. The bill affects state, local, and tribal law enforcement agencies that receive Byrne-JAG funding by giving them new options for equipment purchases. Additionally, the legislation invalidates any federal regulations, rules, or policies issued since May 2015 that previously restricted law enforcement agencies from purchasing these types of vehicles with grant money, immediately removing those restrictions upon the bill's enactment. No new funding or specific timeline is established in the bill beyond the effective date tied to its enactment into law.