This summary is not the rule. The rule text controls.
If you're a tutor (someone managing a minor's property and affairs), and you want to trade the minor's property for other property, or for other property plus cash, you have to ask the court for permission first. This rule spells out what you need to include in that request.
Your petition needs to describe both properties involved in the trade, one the minor currently owns and one you want to trade it for. You also need to give your opinion on what each property is worth, explain the terms of the trade, and lay out why this trade would actually benefit the minor. This is on top of whatever other basic information courts already require for these types of petitions.
The point of all this is to make sure the court can see the full picture before approving any trade. Since minors can't make these decisions or protect their own interests, the court wants proof that the exchange makes sense financially and won't leave the minor worse off. Without this information, the court has no way to judge whether the trade is fair or beneficial.