If the board determines that the disability or death of a member of a defined benefit plan is proximately caused by the gross negligence, willful misconduct, or violation of the law by the member, the board may revoke, suspend, or refuse to grant benefits except an annuity that is the actuarial equivalent of the member's accumulated contributions with regular interest to the day the benefit commences.
Limitations On Disability Or Survivorship Benefits
Mont. Code Ann. § 19-2-906, under Management of Benefit Payments.
Mont. Code Ann. § 19-2-906