This summary is not the rule. The rule text controls.
Here's a plain English summary of this rule about who pays court costs in succession cases.
When a succession case is handled without any disputes (called "ex parte"), the costs of going to court are paid out of the estate itself, as part of the regular expenses of settling the estate. This means the money comes from the assets being distributed, not from any one person's pocket.
When a succession case involves a dispute between parties (called "contradictory"), the person who loses the case usually has to pay the court costs. However, the judge has the final say and can decide to split the costs differently or assign them to someone else if that makes more sense for the situation.
In short, this rule tells you where the money for court costs comes from. If everyone agrees, the estate pays. If there's a fight, the loser usually pays, unless the judge decides otherwise.