Utah Code § 75B-2-112: Penalty provisions.

A provision in a trust instrument purporting to penalize a beneficiary by charging the beneficiary's interest in the trust, or to penalize the beneficiary in another manner, for instituting a proceeding to challenge the acts of the trustee or other fiduciary of a trust, or for instituting other proceedings relating to the trust is unenforceable if probable cause exists for instituting the proceedings.