Not only is the answer, 'no', with the Kentucky River NLRB decision, the request itself, in union facilities, will be impossible to demand.
Why? Because the very act of being 'in charge' serves to separate a charge nurse from union representation. It will be impossible for hospitals to demand that the nurses THEY choose must no longer accept union representation.
And, you can bet that rules that forbid such demands will now be written into every future union contract.
The result: being in charge now bears a price that will fundamentally alter the supply of such nurses, radically increasing their demand. And THAT will mean the costs (to employers) of being in charge will now dramatically rise.
With one caveat: being in charge now carries the means by which some union employees can, at their desire, avoid forced union representation in union facilities. This is not necessarily a bad thing, because it will force unions to be even more proactive for their members to reduce desertion by accepting a charge position.
However you look at it, the role of charge nurse is about to drastically change. And those changes at union facilities will serve to create consistent changes at non-union facilities.
And those changes will also serve to give those that ultimately are tapped to become charge nurses power over such decisions, including the power to say no.