(a) On petition of an interested person, after notice to all interested persons, the court may review the propriety of employment of any person by a trustee including any attorney, auditor, investment advisor or other specialized agent or assistant, and the reasonableness of the compensation of any person so employed, and the reasonableness of the compensation determined by the trustee for the trustee's services. Any person who has received excessive compensation from a trust may be ordered to make appropriate refunds.

(b) If the terms of a trust do not specify the compensation or method for determining the compensation of the trustee, the trustee is entitled to compensation that is reasonable under the circumstances. If the terms of a trust do not specify the compensation or method for determining the compensation of a person employed by the trustee, the person employed by the trustee is entitled to compensation that is reasonable under the circumstances. If the terms of a trust specify the compensation or method for determining the compensation of a trustee and if the trustee is compensated according to these terms, the compensation paid to the trustee is presumed to be reasonable. If the terms of a trust specify the compensation or method for determining the compensation of a person employed by the trustee and if the person employed by the trustee is compensated according to these terms, the compensation paid to the person employed by the trustee is presumed to be reasonable. If a trust specifies the compensation or method for determining the compensation paid to the trustee or person employed by the trustee and if the trustee or person employed by the trustee is compensated accordingly, an interested person who seeks review of the compensation has the burden of proving by a preponderance of the evidence that the compensation paid to the trustee or the person employed by the trustee is not reasonable.