There is also the issue of negotiating a contract and then trying to unilaterally override it. Remember the executive order was for OSHA to study this and then

There is also the issue of negotiating a contract and then trying to unilaterally override it. Remember the executive order was for OSHA to study this and then come up with a ruling, and that hasn't even happened yet, let alone the inevitable court challenges once OSHA comes up with a new policy. So action now means that the employer is just acting unilaterally, without any actual OSHA requirements, trying to amend a union contract - instead of waiting for the OSHA ruling to come out. That's not a particularly strong position to be in. If you are in a rush, then reach out to the union and ask them what it would take to agree to a modification of the contract. Unions will bargain with you if you bother bargaining with them instead of trying to impose mandates. Now unions only cover a small share of employment, but they tend to be bigger in the healthcare sector, and in the current environment workers have a lot of options.