Not Required.
That question came up a couple months ago on The Central Rants and Raves Facebook page. The person complaining about Central PD units not having a MVI.
Some said LE was exempt and so on and it went back and forth. I was getting my MVI at a place I've been going to for over 20 years to get mine and they have been in business longer than that. I told them about the topic about Central PD and asked it they were exempt. The answer was no that LE was not exempt. I had already read the RS for exemptions and they are not listed. Why do some Departments have them and some don't if they are exempt?