Re: Police Marksman - Body Armor?
While I have worked and trained with many federal law enforcement agencies I have never been a civilian law enforcement officer so I cannot speak of municipal force policies.
I served in many climes from Asia, Southeast Asia, the Caribbean, North Africa, the Middle East, Europe, and Australia, and I can tell you threat, climate, and humidity along with movement, equipment, mission, and duration should determine your protection and load/sustainment planning considerations. Not adjusting uniform and equipment for any mission set is deployment by rote.
An inflexible policy may work for a unit that does not actually shoot lots of people daily and can get routine resupply by just getting on the handheld to ask for another lunch, bottle of Gatorade, and handheld battery, or if you're not concerned with the bad guys seeing you directly or on television.
A dictated uniform or policy is one thing, but METT-T (Mission, Equipment, Time, Troops, and Threat) should take priority.
Your mileage and policy may vary.