If parents share joint custody do both parents have to approve of a hired nanny in one of their homes?

I have the same question...If you exclude the "right of first refusal" with regard to watching the children (the other parent should allowed to watch the children over a babysitter or nanny), I think the onus is on the objecting party to prove that the hired caregiver is not in the best interests of the children. I assume "joint" is a democracy and neither party has true "veto" power. I also assume that a 3rd party (court) would have to make a tiebreaker decision--again, the objecting party would need a compelling arguement against a nanny situation since nannying is a common and accepted practice.