From reading and listening to the various folks in the video, my take is this:
If you're a cop (or CO), you have to be in the plan. There's 2 exceptions. Special Deputy (Courthouse security) and Jail Administrator.
The County Administrator wasn't sure if other deputies were not part of the plan, but it was mentioned by the FOP rep and others that there are in fact contract officers (or special deputies) doing something other than courthouse security. They don't want their plan to be disqualified by skirting around the participation rules, so they need an amendment to basically say that an officer can be a special deputy and do something other than courthouse security (which is specifically mentioned).
Financially, now, an officer can work, and be on the plan (withdraw from it), but not contribute the 8% they normally would.
Voting on, and adding the amendment prevents the plan from being disqualified and screwing up all 130+ participants in the plan.
All that being said, I'm still not in favor. I'm not in favor because if a private company wants security, pay for it. Mike Hart made it seem like the Sheriff's office would have someone there anyway, so they may as well pass this. I ask why. Why, outside of Dominion lining the pockets of Evans and his dept. through campaign contributions, new equipment, and paid-for training, should a local police department provide security for the construction of a facility (regardless of that facility's use)? Why should special amendments be made to bypass IRS rules, or at the least, cloud the rules enough to allow someone to work as a police officer but not be paid by the County they enforce the laws in? Instead of having this amendment, tell Dominion to hire their own security. Either Overtime pay, or outside help. That would help everyone. No detriment to the plan. No amendment (which has no end date, and could open the door to other things). No plan members being butthurt because the Sheriff gets to hand pick his 3 guys. Extra pay for certain deputies (if they go the OT route). Extra jobs if they go the security route.