N.C. Gen. Stat. § 35A-1233

When a guardian has disbursed either income or income and principal of the estate according to law, for the purchase of real estate or the support and maintenance of the ward or the ward and his dependents or any lawful cause, and when the personal assets and income of the estate from all sources in the hands of the guardian have been diminished, the penalty of the guardian's bond may be reduced in the discretion of the clerk to an amount not less than the amount that would be required if the guardian were first qualifying to administer the personal assets and income.