I was asked one time to provide certificates showing that I was in fact NRA certified by a student. I had just moved, so it took some time to FIND them, but I provided them no questions asked.
If a PD insisted on them for a student's LTC, I provide them. -My student's welfare comes first. After they had got their LTC I would go in and have a heart-to-heart with the COP and arrive at an understanding.
Believeive it or not, most of these guys, if they are treated with respect (They've been on the job 20 years+ and raised to a high level of repsponsibility, they will expect and to some extent DESERVE respect) are amenable to reason.
As an instructor here I've had occasion to have a lot of interactions with high-level law enforcement.
You can choose to have a cooperative or an adversarial relationship. Your behavior and attitude will shape how that goes.
Do I approve of how LE CoPs have personal approval over rights? No, I don't. But that's the way it is for now. and the fight won't be won by making enemies of LE. Making them your friends and allies will work a lot better. My policy is that LEOs train for free.
It's cost me nothing, has netted me a lot of great contacts and has cemented me as an ally of LE in my area. When I need a favor, or a student does, who do you think gets a sympathetic treatment?