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No, it is not statutorily required and language in parenting plans varies by the number of attorneys who write them. However, some language to the effect that the parties to the parenting plan believe the agreement is in the best interests of the children should be in the agreement as that is the sole reason for any parenting plan or custody order of the court, the best interests of the children and they have nothing to do with the best interests of either of the parents as that is the legal standard the court bases any child custody
decision on. The language you state is not statutory law in the FL Statutes, but it has become the rule in practice and most all attorneys include some statement to that effect in the plan.
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